diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java
index ff0f6e679aeb..179917399b02 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java
@@ -26,6 +26,8 @@
 import org.openapitools.codegen.languages.features.BeanValidationFeatures;
 import org.openapitools.codegen.languages.features.OptionalFeatures;
 import org.openapitools.codegen.languages.features.PerformBeanValidationFeatures;
+import org.openapitools.codegen.templating.mustache.SplitStringLambda;
+import org.openapitools.codegen.templating.mustache.TrimWhitespaceLambda;
 import org.openapitools.codegen.utils.URLPathUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -463,6 +465,10 @@ public void processOpts() {
                 (Mustache.Lambda) (fragment, writer) -> writer.write(fragment.execute().replaceAll("\"", Matcher.quoteReplacement("\\\""))));
         additionalProperties.put("lambdaRemoveLineBreak",
                 (Mustache.Lambda) (fragment, writer) -> writer.write(fragment.execute().replaceAll("\\r|\\n", "")));
+
+        additionalProperties.put("lambdaTrimWhitespace", new TrimWhitespaceLambda());
+
+        additionalProperties.put("lambdaSplitString", new SplitStringLambda());
     }
 
     @Override
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/SplitStringLambda.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/SplitStringLambda.java
new file mode 100644
index 000000000000..89e99804aaf3
--- /dev/null
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/SplitStringLambda.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
+ * Copyright 2018 SmartBear Software
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openapitools.codegen.templating.mustache;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.util.Locale;
+
+import com.samskivert.mustache.Mustache;
+import com.samskivert.mustache.Template.Fragment;
+
+/**
+ * Splits long fragments into smaller strings and uses a StringBuilder to merge
+ * them back.
+ *
+ * Register:
+ *
+ * <pre>
+ * additionalProperties.put("lambdaSplitString", new SplitStringLambda());
+ * </pre>
+ *
+ * Use:
+ *
+ * <pre>
+ * {{#lambdaSplitString}}{{summary}}{{/lambdaSplitString}}
+ * </pre>
+ */
+public class SplitStringLambda implements Mustache.Lambda {
+    private static final int DEFAULT_MAX_LENGTH = 65535;
+
+    private static final String SPLIT_INIT = "new StringBuilder(%d)";
+
+    private static final String SPLIT_PART = ".append(\"%s\")";
+
+    private static final String SPLIT_SUFFIX = ".toString()";
+
+    private final int maxLength;
+
+    public SplitStringLambda() {
+        this(DEFAULT_MAX_LENGTH);
+    }
+
+    public SplitStringLambda(int maxLength) {
+        this.maxLength = maxLength;
+    }
+
+    @Override
+    public void execute(Fragment fragment, Writer writer) throws IOException {
+        String input = fragment.execute();
+        int inputLength = input.length();
+
+        StringBuilder builder = new StringBuilder();
+        if (inputLength > maxLength) {
+
+            // Initialize a StringBuilder
+            builder.append(String.format(Locale.ROOT, SPLIT_INIT, inputLength));
+
+            int currentPosition = 0;
+            int currentStringLength = 0;
+            char currentLastChar = '\\';
+
+            // Split input into parts of at most maxLength and not ending with an escape character
+            // Append each part to the StringBuilder
+            while (currentPosition + maxLength < input.length()) {
+                currentStringLength = maxLength;
+                currentLastChar = input.charAt(currentPosition + currentStringLength - 1);
+                if (currentLastChar == '\\') {
+                    --currentStringLength;
+                }
+
+                builder.append(String.format(Locale.ROOT, SPLIT_PART, input.substring(currentPosition, currentPosition + currentStringLength)));
+                currentPosition += currentStringLength;
+            }
+
+            // Append last part if necessary
+            if (currentPosition < input.length()) {
+                builder.append(String.format(Locale.ROOT, SPLIT_PART, input.substring(currentPosition)));
+            }
+
+            // Close the builder and merge everything back to a string
+            builder.append(SPLIT_SUFFIX);
+        } else {
+            builder.append(String.format(Locale.ROOT, "\"%s\"", input));
+        }
+
+        writer.write(builder.toString());
+    }
+
+}
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/TrimWhitespaceLambda.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/TrimWhitespaceLambda.java
new file mode 100644
index 000000000000..bdf1d136534a
--- /dev/null
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/TrimWhitespaceLambda.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
+ * Copyright 2018 SmartBear Software
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openapitools.codegen.templating.mustache;
+
+import java.io.IOException;
+import java.io.Writer;
+
+import com.samskivert.mustache.Mustache;
+import com.samskivert.mustache.Template.Fragment;
+
+/**
+ * Replaces duplicate whitespace characters in a fragment with single space.
+ *
+ * Register:
+ * <pre>
+ * additionalProperties.put("lambdaTrimWhitespace", new TrimWhitespaceLambda());
+ * </pre>
+ *
+ * Use:
+ * <pre>
+ * {{#lambdaTrimWhitespace}}{{name}}{{/lambdaTrimWhitespace}}
+ * </pre>
+ */
+public class TrimWhitespaceLambda implements Mustache.Lambda {
+    private static final String SINGLE_SPACE = " ";
+
+    private static final String WHITESPACE_REGEX = "\\s+";
+
+    @Override
+    public void execute(Fragment fragment, Writer writer) throws IOException {
+        writer.write(fragment.execute().replaceAll(WHITESPACE_REGEX, SINGLE_SPACE));
+    }
+
+}
diff --git a/modules/openapi-generator/src/main/resources/JavaSpring/exampleString.mustache b/modules/openapi-generator/src/main/resources/JavaSpring/exampleString.mustache
new file mode 100644
index 000000000000..1f72a330ef62
--- /dev/null
+++ b/modules/openapi-generator/src/main/resources/JavaSpring/exampleString.mustache
@@ -0,0 +1 @@
+{{#lambdaSplitString}}{{#lambdaRemoveLineBreak}}{{#lambdaEscapeDoubleQuote}}{{#lambdaTrimWhitespace}}{{{example}}}{{/lambdaTrimWhitespace}}{{/lambdaEscapeDoubleQuote}}{{/lambdaRemoveLineBreak}}{{/lambdaSplitString}}
\ No newline at end of file
diff --git a/modules/openapi-generator/src/main/resources/JavaSpring/methodBody.mustache b/modules/openapi-generator/src/main/resources/JavaSpring/methodBody.mustache
index 40b041331ce3..e71414e99e1a 100644
--- a/modules/openapi-generator/src/main/resources/JavaSpring/methodBody.mustache
+++ b/modules/openapi-generator/src/main/resources/JavaSpring/methodBody.mustache
@@ -8,7 +8,8 @@ return CompletableFuture.supplyAsync(()-> {
 {{#async}}    {{/async}}            {{/jdk8}}for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
     {{/-first}}
 {{#async}}        {{/async}}{{^async}}{{#jdk8}}    {{/jdk8}}{{/async}}            if (mediaType.isCompatibleWith(MediaType.valueOf("{{{contentType}}}"))) {
-{{#async}}        {{/async}}{{^async}}{{#jdk8}}    {{/jdk8}}{{/async}}                ApiUtil.setExampleResponse(request, "{{{contentType}}}", "{{#lambdaRemoveLineBreak}}{{#lambdaEscapeDoubleQuote}}{{{example}}}{{/lambdaEscapeDoubleQuote}}{{/lambdaRemoveLineBreak}}");
+{{#async}}        {{/async}}{{^async}}{{#jdk8}}    {{/jdk8}}{{/async}}                String exampleString = {{>exampleString}};
+{{#async}}        {{/async}}{{^async}}{{#jdk8}}    {{/jdk8}}{{/async}}                ApiUtil.setExampleResponse(request, "{{{contentType}}}", exampleString);
 {{#async}}        {{/async}}{{^async}}{{#jdk8}}    {{/jdk8}}{{/async}}                break;
 {{#async}}        {{/async}}{{^async}}{{#jdk8}}    {{/jdk8}}{{/async}}            }
     {{#-last}}
@@ -36,7 +37,8 @@ Mono<Void> result = Mono.empty();
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
         {{/-first}}
             if (mediaType.isCompatibleWith(MediaType.valueOf("{{{contentType}}}"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{{#lambdaRemoveLineBreak}}{{#lambdaEscapeDoubleQuote}}{{{example}}}{{/lambdaEscapeDoubleQuote}}{{/lambdaRemoveLineBreak}}");
+                String exampleString = {{>exampleString}};
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         {{#-last}}
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/templating/mustache/SplitStringLambdaTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/templating/mustache/SplitStringLambdaTest.java
new file mode 100644
index 000000000000..0224a1e695ca
--- /dev/null
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/templating/mustache/SplitStringLambdaTest.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
+ * Copyright 2018 SmartBear Software
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openapitools.codegen.templating.mustache;
+
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertEquals;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+import com.samskivert.mustache.Template.Fragment;
+
+public class SplitStringLambdaTest {
+    private static final String INPUT_STRING = "1112223334";
+
+    private static final Map<Integer, String> EXPECTED_OUTPUTS;
+    static {
+        EXPECTED_OUTPUTS = new HashMap<>();
+        EXPECTED_OUTPUTS.put(2,
+                String.format(
+                        Locale.ROOT,
+                        "new StringBuilder(%d).append(\"11\").append(\"12\").append(\"22\").append(\"33\").append(\"34\").toString()",
+                        INPUT_STRING.length()));
+        EXPECTED_OUTPUTS.put(3,
+                String.format(
+                        Locale.ROOT,
+                        "new StringBuilder(%d).append(\"111\").append(\"222\").append(\"333\").append(\"4\").toString()",
+                        INPUT_STRING.length()));
+    }
+
+    private static final String INPUT_QUOTED_STRING = "1\\\"11\\\"2223\\\"334";
+    private static final String INPUT_QUOTED_OUTPUT = String.format(
+            Locale.ROOT,
+            "new StringBuilder(%d).append(\"1\\\"\").append(\"11\").append(\"\\\"2\").append(\"223\").append(\"\\\"3\").append(\"34\").toString()",
+            INPUT_QUOTED_STRING.length());
+
+    @Mock
+    private Fragment fragment;
+
+    @BeforeMethod
+    public void init() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @AfterMethod
+    public void reset() {
+        Mockito.reset(fragment);
+    }
+
+    private void testString(String input, int maxLength, String expected) throws IOException {
+        when(fragment.execute()).thenReturn(input);
+
+        StringWriter output = new StringWriter();
+        new SplitStringLambda(maxLength).execute(fragment, output);
+        assertEquals(output.toString(), expected);
+    }
+
+    @Test
+    public void testSplitGroupsOf2() throws IOException {
+        int maxLength = 2;
+        testString(INPUT_STRING, maxLength, EXPECTED_OUTPUTS.get(maxLength));
+    }
+
+    @Test
+    public void testSplitGroupsOf3() throws IOException {
+        int maxLength = 3;
+        testString(INPUT_STRING, maxLength, EXPECTED_OUTPUTS.get(maxLength));
+    }
+
+    @Test
+    public void testSplitQuotedString() throws IOException {
+        int maxLength = 3;
+        testString(INPUT_QUOTED_STRING, maxLength, INPUT_QUOTED_OUTPUT);
+    }
+
+    @Test
+    public void testShortString() throws IOException {
+        testString(INPUT_STRING, INPUT_STRING.length(), String.format(Locale.ROOT, "\"%s\"", INPUT_STRING));
+    }
+
+}
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/templating/mustache/TrimWhitespaceLambdaTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/templating/mustache/TrimWhitespaceLambdaTest.java
new file mode 100644
index 000000000000..556bde9e1058
--- /dev/null
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/templating/mustache/TrimWhitespaceLambdaTest.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
+ * Copyright 2018 SmartBear Software
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openapitools.codegen.templating.mustache;
+
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertEquals;
+
+import java.io.IOException;
+import java.io.StringWriter;
+
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+import com.samskivert.mustache.Template.Fragment;
+
+public class TrimWhitespaceLambdaTest {
+
+    @Mock
+    private Fragment fragment;
+
+    @BeforeMethod
+    public void init() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @AfterMethod
+    public void reset() {
+        Mockito.reset(fragment);
+    }
+
+    @Test
+    public void testTrimWhitespace() throws IOException {
+        when(fragment.execute()).thenReturn("\t a  b\t\tc \t");
+
+        StringWriter output = new StringWriter();
+        new TrimWhitespaceLambda().execute(fragment, output);
+        assertEquals(output.toString(), " a b c ");
+    }
+
+}
diff --git a/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/PetApi.java b/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/PetApi.java
index 8a3cdac2d3a1..7296fa52c150 100644
--- a/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/PetApi.java
+++ b/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/PetApi.java
@@ -86,11 +86,13 @@ default ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "S
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -116,11 +118,13 @@ default ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tag
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -144,11 +148,13 @@ default ResponseEntity<Pet> getPetById(@ApiParam(value = "ID of pet to return",r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -210,7 +216,8 @@ default ResponseEntity<ModelApiResponse> uploadFile(@ApiParam(value = "ID of pet
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/StoreApi.java b/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/StoreApi.java
index e12e9f1d48db..f32fb731ad05 100644
--- a/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/StoreApi.java
+++ b/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/StoreApi.java
@@ -74,11 +74,13 @@ default ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -99,11 +101,13 @@ default ResponseEntity<Order> placeOrder(@ApiParam(value = "order placed for pur
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/UserApi.java b/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/UserApi.java
index 03897a65e143..b7f2e073c797 100644
--- a/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/UserApi.java
+++ b/samples/client/petstore/spring-stubs/src/main/java/org/openapitools/api/UserApi.java
@@ -93,11 +93,13 @@ default ResponseEntity<User> getUserByName(@ApiParam(value = "The name that need
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                    String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                    String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/AnotherFakeApi.java b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/AnotherFakeApi.java
index 48e06a9e5fc2..e8ead42ee124 100644
--- a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/AnotherFakeApi.java
+++ b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/AnotherFakeApi.java
@@ -48,7 +48,8 @@ default CompletableFuture<ResponseEntity<Client>> call123testSpecialTags(@ApiPar
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                        String exampleString = "{ \"client\" : \"client\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                 }
diff --git a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/FakeApi.java b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/FakeApi.java
index 851b3e054c74..306426fa9ed1 100644
--- a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/FakeApi.java
+++ b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/FakeApi.java
@@ -81,7 +81,8 @@ default CompletableFuture<ResponseEntity<OuterComposite>> fakeOuterCompositeSeri
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                        ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                        String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                        ApiUtil.setExampleResponse(request, "*/*", exampleString);
                         break;
                     }
                 }
@@ -152,7 +153,8 @@ default CompletableFuture<ResponseEntity<Client>> testClientModel(@ApiParam(valu
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                        String exampleString = "{ \"client\" : \"client\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                 }
@@ -254,7 +256,8 @@ default CompletableFuture<ResponseEntity<ModelApiResponse>> uploadFileWithRequir
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                        String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                 }
diff --git a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/FakeClassnameTestApi.java b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
index e75ef015a3aa..85db0b3e3aea 100644
--- a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
+++ b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
@@ -50,7 +50,8 @@ default CompletableFuture<ResponseEntity<Client>> testClassname(@ApiParam(value
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                        String exampleString = "{ \"client\" : \"client\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                 }
diff --git a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/PetApi.java b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/PetApi.java
index d12ba9ed6429..4ce862822cd6 100644
--- a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/PetApi.java
+++ b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/PetApi.java
@@ -90,11 +90,13 @@ default CompletableFuture<ResponseEntity<List<Pet>>> findPetsByStatus(@NotNull @
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                        String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                        ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                        String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                        ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                         break;
                     }
                 }
@@ -122,11 +124,13 @@ default CompletableFuture<ResponseEntity<List<Pet>>> findPetsByTags(@NotNull @Ap
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                        String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                        ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                        String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                        ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                         break;
                     }
                 }
@@ -152,11 +156,13 @@ default CompletableFuture<ResponseEntity<Pet>> getPetById(@ApiParam(value = "ID
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                        String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                        ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                        String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                        ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                         break;
                     }
                 }
@@ -221,7 +227,8 @@ default CompletableFuture<ResponseEntity<ModelApiResponse>> uploadFile(@ApiParam
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                        String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                 }
diff --git a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/StoreApi.java b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/StoreApi.java
index 2dc313a53b8a..c1375bf11316 100644
--- a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/StoreApi.java
+++ b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/StoreApi.java
@@ -76,11 +76,13 @@ default CompletableFuture<ResponseEntity<Order>> getOrderById(@Min(1L) @Max(5L)
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                        String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                        ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                        String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                        ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                         break;
                     }
                 }
@@ -103,11 +105,13 @@ default CompletableFuture<ResponseEntity<Order>> placeOrder(@ApiParam(value = "o
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                        String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                        ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                        String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                        ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                         break;
                     }
                 }
diff --git a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/UserApi.java b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/UserApi.java
index 8ede362ba0fe..ab1d926a2e57 100644
--- a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/UserApi.java
+++ b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/api/UserApi.java
@@ -95,11 +95,13 @@ default CompletableFuture<ResponseEntity<User>> getUserByName(@ApiParam(value =
             getRequest().ifPresent(request -> {
                 for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                        ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                        String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                        ApiUtil.setExampleResponse(request, "application/json", exampleString);
                         break;
                     }
                     if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                        ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                        String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                        ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                         break;
                     }
                 }
diff --git a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/AnotherFakeApi.java b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/AnotherFakeApi.java
index 9a93b057baad..9c42b1915cf8 100644
--- a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/AnotherFakeApi.java
+++ b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/AnotherFakeApi.java
@@ -46,7 +46,8 @@ default ResponseEntity<Client> call123testSpecialTags(@ApiParam(value = "client
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/FakeApi.java b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/FakeApi.java
index 68ff26c0e132..78052f181030 100644
--- a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/FakeApi.java
+++ b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/FakeApi.java
@@ -79,7 +79,8 @@ default ResponseEntity<OuterComposite> fakeOuterCompositeSerialize(@ApiParam(val
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                    ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                    String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                    ApiUtil.setExampleResponse(request, "*/*", exampleString);
                     break;
                 }
             }
@@ -148,7 +149,8 @@ default ResponseEntity<Client> testClientModel(@ApiParam(value = "client model"
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
@@ -248,7 +250,8 @@ default ResponseEntity<ModelApiResponse> uploadFileWithRequiredFile(@ApiParam(va
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/FakeClassnameTestApi.java b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
index 483949a5cb6b..71fc4168f87c 100644
--- a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
+++ b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
@@ -48,7 +48,8 @@ default ResponseEntity<Client> testClassname(@ApiParam(value = "client model" ,r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/PetApi.java b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/PetApi.java
index be0c56e311ed..d0f2893bda61 100644
--- a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/PetApi.java
+++ b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/PetApi.java
@@ -88,11 +88,13 @@ default ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "S
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -118,11 +120,13 @@ default ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tag
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -146,11 +150,13 @@ default ResponseEntity<Pet> getPetById(@ApiParam(value = "ID of pet to return",r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -213,7 +219,8 @@ default ResponseEntity<ModelApiResponse> uploadFile(@ApiParam(value = "ID of pet
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/StoreApi.java b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/StoreApi.java
index b9b13f85b21d..9fd364923e15 100644
--- a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/StoreApi.java
+++ b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/StoreApi.java
@@ -74,11 +74,13 @@ default ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -99,11 +101,13 @@ default ResponseEntity<Order> placeOrder(@ApiParam(value = "order placed for pur
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/UserApi.java b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/UserApi.java
index 4e63f5635ff7..bcaa945800f9 100644
--- a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/UserApi.java
+++ b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/api/UserApi.java
@@ -93,11 +93,13 @@ default ResponseEntity<User> getUserByName(@ApiParam(value = "The name that need
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                    String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                    String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/AnotherFakeApiController.java b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/AnotherFakeApiController.java
index 5043c58114fe..fb922708cb05 100644
--- a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/AnotherFakeApiController.java
+++ b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/AnotherFakeApiController.java
@@ -34,7 +34,8 @@ public AnotherFakeApiController(NativeWebRequest request) {
     public ResponseEntity<Client> call123testSpecialTags(@ApiParam(value = "client model" ,required=true )  @Valid @RequestBody Client body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/FakeApiController.java b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/FakeApiController.java
index dc60b7280558..1778cc30e75d 100644
--- a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/FakeApiController.java
+++ b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/FakeApiController.java
@@ -54,7 +54,8 @@ public ResponseEntity<Boolean> fakeOuterBooleanSerialize(@ApiParam(value = "Inpu
     public ResponseEntity<OuterComposite> fakeOuterCompositeSerialize(@ApiParam(value = "Input composite as post body"  )  @Valid @RequestBody OuterComposite body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                ApiUtil.setExampleResponse(request, "*/*", exampleString);
                 break;
             }
         }
@@ -85,7 +86,8 @@ public ResponseEntity<Void> testBodyWithQueryParams(@NotNull @ApiParam(value = "
     public ResponseEntity<Client> testClientModel(@ApiParam(value = "client model" ,required=true )  @Valid @RequestBody Client body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
@@ -126,7 +128,8 @@ public ResponseEntity<Void> testQueryParameterCollectionFormat(@NotNull @ApiPara
     public ResponseEntity<ModelApiResponse> uploadFileWithRequiredFile(@ApiParam(value = "ID of pet to update",required=true) @PathVariable("petId") Long petId,@ApiParam(value = "file detail") @Valid @RequestPart("file") MultipartFile requiredFile,@ApiParam(value = "Additional data to pass to server") @RequestParam(value="additionalMetadata", required=false)  String additionalMetadata) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/FakeClassnameTestApiController.java b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/FakeClassnameTestApiController.java
index a3b9ad557a77..d2642a4ceeb2 100644
--- a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/FakeClassnameTestApiController.java
+++ b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/FakeClassnameTestApiController.java
@@ -34,7 +34,8 @@ public FakeClassnameTestApiController(NativeWebRequest request) {
     public ResponseEntity<Client> testClassname(@ApiParam(value = "client model" ,required=true )  @Valid @RequestBody Client body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/PetApiController.java b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/PetApiController.java
index 53c37962bdfc..b1e82a3f7376 100644
--- a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/PetApiController.java
+++ b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/PetApiController.java
@@ -46,11 +46,13 @@ public ResponseEntity<Void> deletePet(@ApiParam(value = "Pet id to delete",requi
     public ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "Status values that need to be considered for filter", required = true, allowableValues = "available, pending, sold") @Valid @RequestParam(value = "status", required = true) List<String> status) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
@@ -61,11 +63,13 @@ public ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "St
     public ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tags to filter by", required = true) @Valid @RequestParam(value = "tags", required = true) List<String> tags) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
@@ -76,11 +80,13 @@ public ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tags
     public ResponseEntity<Pet> getPetById(@ApiParam(value = "ID of pet to return",required=true) @PathVariable("petId") Long petId) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
@@ -101,7 +107,8 @@ public ResponseEntity<Void> updatePetWithForm(@ApiParam(value = "ID of pet that
     public ResponseEntity<ModelApiResponse> uploadFile(@ApiParam(value = "ID of pet to update",required=true) @PathVariable("petId") Long petId,@ApiParam(value = "Additional data to pass to server") @RequestParam(value="additionalMetadata", required=false)  String additionalMetadata,@ApiParam(value = "file detail") @Valid @RequestPart("file") MultipartFile file) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/StoreApiController.java b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/StoreApiController.java
index acddbe963522..63aa57e3c02d 100644
--- a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/StoreApiController.java
+++ b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/StoreApiController.java
@@ -45,11 +45,13 @@ public ResponseEntity<Map<String, Integer>> getInventory() {
     public ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "ID of pet that needs to be fetched",required=true) @PathVariable("order_id") Long orderId) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
@@ -60,11 +62,13 @@ public ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "I
     public ResponseEntity<Order> placeOrder(@ApiParam(value = "order placed for purchasing the pet" ,required=true )  @Valid @RequestBody Order body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/UserApiController.java b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/UserApiController.java
index 40b796dc32d1..6c7ad6eaf7eb 100644
--- a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/UserApiController.java
+++ b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/api/UserApiController.java
@@ -55,11 +55,13 @@ public ResponseEntity<Void> deleteUser(@ApiParam(value = "The name that needs to
     public ResponseEntity<User> getUserByName(@ApiParam(value = "The name that needs to be fetched. Use user1 for testing.",required=true) @PathVariable("username") String username) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/AnotherFakeApiController.java b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/AnotherFakeApiController.java
index 28462f31ab3b..a01520a180f9 100644
--- a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/AnotherFakeApiController.java
+++ b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/AnotherFakeApiController.java
@@ -34,7 +34,8 @@ public AnotherFakeApiController(NativeWebRequest request) {
     public ResponseEntity<Client> call123testSpecialTags(@ApiParam(value = "client model" ,required=true )  @Valid @RequestBody Client body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeApiController.java b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeApiController.java
index d03f6b39ba5b..af119a493c4a 100644
--- a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeApiController.java
+++ b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeApiController.java
@@ -54,7 +54,8 @@ public ResponseEntity<Boolean> fakeOuterBooleanSerialize(@ApiParam(value = "Inpu
     public ResponseEntity<OuterComposite> fakeOuterCompositeSerialize(@ApiParam(value = "Input composite as post body"  )  @Valid @RequestBody OuterComposite body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                ApiUtil.setExampleResponse(request, "*/*", exampleString);
                 break;
             }
         }
@@ -85,7 +86,8 @@ public ResponseEntity<Void> testBodyWithQueryParams(@NotNull @ApiParam(value = "
     public ResponseEntity<Client> testClientModel(@ApiParam(value = "client model" ,required=true )  @Valid @RequestBody Client body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
@@ -126,7 +128,8 @@ public ResponseEntity<Void> testQueryParameterCollectionFormat(@NotNull @ApiPara
     public ResponseEntity<ModelApiResponse> uploadFileWithRequiredFile(@ApiParam(value = "ID of pet to update",required=true) @PathVariable("petId") Long petId,@ApiParam(value = "file detail") @Valid @RequestPart("file") MultipartFile requiredFile,@ApiParam(value = "Additional data to pass to server") @RequestParam(value="additionalMetadata", required=false)  String additionalMetadata) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeClassnameTestApiController.java b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeClassnameTestApiController.java
index b749d734b415..378b0d9a486d 100644
--- a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeClassnameTestApiController.java
+++ b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeClassnameTestApiController.java
@@ -34,7 +34,8 @@ public FakeClassnameTestApiController(NativeWebRequest request) {
     public ResponseEntity<Client> testClassname(@ApiParam(value = "client model" ,required=true )  @Valid @RequestBody Client body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/PetApiController.java b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/PetApiController.java
index bf3d57f90aad..b263f984ecd7 100644
--- a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/PetApiController.java
+++ b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/PetApiController.java
@@ -46,11 +46,13 @@ public ResponseEntity<Void> deletePet(@ApiParam(value = "Pet id to delete",requi
     public ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "Status values that need to be considered for filter", required = true, allowableValues = "available, pending, sold") @Valid @RequestParam(value = "status", required = true) List<String> status) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
@@ -61,11 +63,13 @@ public ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "St
     public ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tags to filter by", required = true) @Valid @RequestParam(value = "tags", required = true) List<String> tags) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
@@ -76,11 +80,13 @@ public ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tags
     public ResponseEntity<Pet> getPetById(@ApiParam(value = "ID of pet to return",required=true) @PathVariable("petId") Long petId) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
@@ -101,7 +107,8 @@ public ResponseEntity<Void> updatePetWithForm(@ApiParam(value = "ID of pet that
     public ResponseEntity<ModelApiResponse> uploadFile(@ApiParam(value = "ID of pet to update",required=true) @PathVariable("petId") Long petId,@ApiParam(value = "Additional data to pass to server") @RequestParam(value="additionalMetadata", required=false)  String additionalMetadata,@ApiParam(value = "file detail") @Valid @RequestPart("file") MultipartFile file) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/StoreApiController.java b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/StoreApiController.java
index 28ce69c093d5..6d52b0acce56 100644
--- a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/StoreApiController.java
+++ b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/StoreApiController.java
@@ -45,11 +45,13 @@ public ResponseEntity<Map<String, Integer>> getInventory() {
     public ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "ID of pet that needs to be fetched",required=true) @PathVariable("order_id") Long orderId) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
@@ -60,11 +62,13 @@ public ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "I
     public ResponseEntity<Order> placeOrder(@ApiParam(value = "order placed for purchasing the pet" ,required=true )  @Valid @RequestBody Order body) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/UserApiController.java b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/UserApiController.java
index 58f252ae90a7..d87450cf58ed 100644
--- a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/UserApiController.java
+++ b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/UserApiController.java
@@ -55,11 +55,13 @@ public ResponseEntity<Void> deleteUser(@ApiParam(value = "The name that needs to
     public ResponseEntity<User> getUserByName(@ApiParam(value = "The name that needs to be fetched. Use user1 for testing.",required=true) @PathVariable("username") String username) {
         for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                ApiUtil.setExampleResponse(request, "application/json", exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java
index bdefef0d331b..a8c46f16e4a7 100644
--- a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java
+++ b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java
@@ -30,7 +30,8 @@ default ResponseEntity<Client> call123testSpecialTags(Client body) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeApiDelegate.java b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeApiDelegate.java
index 03441e760eb4..9f4a2692e9e8 100644
--- a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeApiDelegate.java
+++ b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeApiDelegate.java
@@ -56,7 +56,8 @@ default ResponseEntity<OuterComposite> fakeOuterCompositeSerialize(OuterComposit
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                    ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                    String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                    ApiUtil.setExampleResponse(request, "*/*", exampleString);
                     break;
                 }
             }
@@ -105,7 +106,8 @@ default ResponseEntity<Client> testClientModel(Client body) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
@@ -201,7 +203,8 @@ default ResponseEntity<ModelApiResponse> uploadFileWithRequiredFile(Long petId,
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java
index 3e95af6de1c6..df29ad43a893 100644
--- a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java
+++ b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java
@@ -30,7 +30,8 @@ default ResponseEntity<Client> testClassname(Client body) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/PetApiDelegate.java b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/PetApiDelegate.java
index b2b7360f4dc6..ea1a5ebed508 100644
--- a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/PetApiDelegate.java
+++ b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/PetApiDelegate.java
@@ -49,11 +49,13 @@ default ResponseEntity<List<Pet>> findPetsByStatus(List<String> status) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -69,11 +71,13 @@ default ResponseEntity<List<Pet>> findPetsByTags(List<String> tags) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -89,11 +93,13 @@ default ResponseEntity<Pet> getPetById(Long petId) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -129,7 +135,8 @@ default ResponseEntity<ModelApiResponse> uploadFile(Long petId,
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/StoreApiDelegate.java b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/StoreApiDelegate.java
index 995ff1dc25f9..036309ceb6ff 100644
--- a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/StoreApiDelegate.java
+++ b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/StoreApiDelegate.java
@@ -47,11 +47,13 @@ default ResponseEntity<Order> getOrderById(Long orderId) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -67,11 +69,13 @@ default ResponseEntity<Order> placeOrder(Order body) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/UserApiDelegate.java b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/UserApiDelegate.java
index bc3af7039732..c90d5e722193 100644
--- a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/UserApiDelegate.java
+++ b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/UserApiDelegate.java
@@ -63,11 +63,13 @@ default ResponseEntity<User> getUserByName(String username) {
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                    String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                    String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/AnotherFakeApi.java b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/AnotherFakeApi.java
index 29b51909fd90..669a46f41402 100644
--- a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/AnotherFakeApi.java
+++ b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/AnotherFakeApi.java
@@ -48,7 +48,8 @@ default ResponseEntity<Client> call123testSpecialTags(@ApiParam(value = "client
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeApi.java b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeApi.java
index 3d76194529fe..1a15a9f04406 100644
--- a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeApi.java
+++ b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeApi.java
@@ -85,7 +85,8 @@ default ResponseEntity<OuterComposite> fakeOuterCompositeSerialize(@ApiParam(val
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                    ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                    String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                    ApiUtil.setExampleResponse(request, "*/*", exampleString);
                     break;
                 }
             }
@@ -164,7 +165,8 @@ default ResponseEntity<Client> testClientModel(@ApiParam(value = "client model"
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
@@ -282,7 +284,8 @@ default ResponseEntity<ModelApiResponse> uploadFileWithRequiredFile(@ApiParam(va
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeClassnameTestApi.java b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
index cf696d7bd304..ae5ef51ea074 100644
--- a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
+++ b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
@@ -50,7 +50,8 @@ default ResponseEntity<Client> testClassname(@ApiParam(value = "client model" ,r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/PetApi.java b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/PetApi.java
index f576eb40b0b1..b0c9925f23c6 100644
--- a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/PetApi.java
+++ b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/PetApi.java
@@ -95,11 +95,13 @@ default ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "S
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -127,11 +129,13 @@ default ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tag
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -157,11 +161,13 @@ default ResponseEntity<Pet> getPetById(@ApiParam(value = "ID of pet to return",r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -230,7 +236,8 @@ default ResponseEntity<ModelApiResponse> uploadFile(@ApiParam(value = "ID of pet
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/StoreApi.java b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/StoreApi.java
index 27165f532d08..9824a85a8de3 100644
--- a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/StoreApi.java
+++ b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/StoreApi.java
@@ -80,11 +80,13 @@ default ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -107,11 +109,13 @@ default ResponseEntity<Order> placeOrder(@ApiParam(value = "order placed for pur
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/UserApi.java b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/UserApi.java
index 6a63e6c793f9..b7b789d57eb2 100644
--- a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/UserApi.java
+++ b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/UserApi.java
@@ -103,11 +103,13 @@ default ResponseEntity<User> getUserByName(@ApiParam(value = "The name that need
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                    String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                    String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java
index a67f2f5387cf..549a66207fa0 100644
--- a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java
+++ b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java
@@ -35,7 +35,8 @@ default Mono<ResponseEntity<Client>> call123testSpecialTags(Mono<Client> body,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApiDelegate.java b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApiDelegate.java
index 2c23dcd502b4..c61a3d26c7c7 100644
--- a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApiDelegate.java
+++ b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApiDelegate.java
@@ -67,7 +67,8 @@ default Mono<ResponseEntity<OuterComposite>> fakeOuterCompositeSerialize(Mono<Ou
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
@@ -129,7 +130,8 @@ default Mono<ResponseEntity<Client>> testClientModel(Mono<Client> body,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
@@ -244,7 +246,8 @@ default Mono<ResponseEntity<ModelApiResponse>> uploadFileWithRequiredFile(Long p
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java
index d99a67396261..0373ca1aec33 100644
--- a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java
+++ b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java
@@ -35,7 +35,8 @@ default Mono<ResponseEntity<Client>> testClassname(Mono<Client> body,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"client\" : \"client\"}");
+                String exampleString = "{ \"client\" : \"client\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/PetApiDelegate.java b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/PetApiDelegate.java
index 630d4a3f99d6..f8f3d8fd98c8 100644
--- a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/PetApiDelegate.java
+++ b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/PetApiDelegate.java
@@ -60,11 +60,13 @@ default Mono<ResponseEntity<Flux<Pet>>> findPetsByStatus(List<String> status,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                result = ApiUtil.getExampleResponse(exchange, "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
@@ -81,11 +83,13 @@ default Mono<ResponseEntity<Flux<Pet>>> findPetsByTags(List<String> tags,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                result = ApiUtil.getExampleResponse(exchange, "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
@@ -102,11 +106,13 @@ default Mono<ResponseEntity<Pet>> getPetById(Long petId,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                result = ApiUtil.getExampleResponse(exchange, "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
@@ -149,7 +155,8 @@ default Mono<ResponseEntity<ModelApiResponse>> uploadFile(Long petId,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/StoreApiDelegate.java b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/StoreApiDelegate.java
index 72fb559347e2..672d1dbb8d37 100644
--- a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/StoreApiDelegate.java
+++ b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/StoreApiDelegate.java
@@ -57,11 +57,13 @@ default Mono<ResponseEntity<Order>> getOrderById(Long orderId,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                result = ApiUtil.getExampleResponse(exchange, "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
@@ -78,11 +80,13 @@ default Mono<ResponseEntity<Order>> placeOrder(Mono<Order> body,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                result = ApiUtil.getExampleResponse(exchange, "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/UserApiDelegate.java b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/UserApiDelegate.java
index 156ba16a7693..13994de33a82 100644
--- a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/UserApiDelegate.java
+++ b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/UserApiDelegate.java
@@ -80,11 +80,13 @@ default Mono<ResponseEntity<User>> getUserByName(String username,
         exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                result = ApiUtil.getExampleResponse(exchange, "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                result = ApiUtil.getExampleResponse(exchange, "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                result = ApiUtil.getExampleResponse(exchange, exampleString);
                 break;
             }
         }
diff --git a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/AnotherFakeApi.java b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/AnotherFakeApi.java
index 9a93b057baad..9c42b1915cf8 100644
--- a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/AnotherFakeApi.java
+++ b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/AnotherFakeApi.java
@@ -46,7 +46,8 @@ default ResponseEntity<Client> call123testSpecialTags(@ApiParam(value = "client
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeApi.java b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeApi.java
index bc118661dbdd..3910c5797c4d 100644
--- a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeApi.java
+++ b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeApi.java
@@ -79,7 +79,8 @@ default ResponseEntity<OuterComposite> fakeOuterCompositeSerialize(@ApiParam(val
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                    ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                    String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                    ApiUtil.setExampleResponse(request, "*/*", exampleString);
                     break;
                 }
             }
@@ -148,7 +149,8 @@ default ResponseEntity<Client> testClientModel(@ApiParam(value = "client model"
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
@@ -248,7 +250,8 @@ default ResponseEntity<ModelApiResponse> uploadFileWithRequiredFile(@ApiParam(va
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeClassnameTestApi.java b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
index 483949a5cb6b..71fc4168f87c 100644
--- a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
+++ b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
@@ -48,7 +48,8 @@ default ResponseEntity<Client> testClassname(@ApiParam(value = "client model" ,r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/PetApi.java b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/PetApi.java
index 84413287f672..beb6a1e9e610 100644
--- a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/PetApi.java
+++ b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/PetApi.java
@@ -88,11 +88,13 @@ default ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "S
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -118,11 +120,13 @@ default ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tag
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -146,11 +150,13 @@ default ResponseEntity<Pet> getPetById(@ApiParam(value = "ID of pet to return",r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -213,7 +219,8 @@ default ResponseEntity<ModelApiResponse> uploadFile(@ApiParam(value = "ID of pet
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/StoreApi.java b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/StoreApi.java
index b9b13f85b21d..9fd364923e15 100644
--- a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/StoreApi.java
+++ b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/StoreApi.java
@@ -74,11 +74,13 @@ default ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -99,11 +101,13 @@ default ResponseEntity<Order> placeOrder(@ApiParam(value = "order placed for pur
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/UserApi.java b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/UserApi.java
index 4e63f5635ff7..bcaa945800f9 100644
--- a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/UserApi.java
+++ b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/UserApi.java
@@ -93,11 +93,13 @@ default ResponseEntity<User> getUserByName(@ApiParam(value = "The name that need
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                    String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                    String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/AnotherFakeApi.java b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/AnotherFakeApi.java
index b7618b9d629b..12599cc0cc0a 100644
--- a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/AnotherFakeApi.java
+++ b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/AnotherFakeApi.java
@@ -50,7 +50,8 @@ default ResponseEntity<Client> call123testSpecialTags(@ApiParam(value = "client
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeApi.java b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeApi.java
index 66625909854b..26ed3ba5425f 100644
--- a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeApi.java
+++ b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeApi.java
@@ -85,7 +85,8 @@ default ResponseEntity<OuterComposite> fakeOuterCompositeSerialize(@ApiParam(val
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                    ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                    String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                    ApiUtil.setExampleResponse(request, "*/*", exampleString);
                     break;
                 }
             }
@@ -159,7 +160,8 @@ default ResponseEntity<Client> testClientModel(@ApiParam(value = "client model"
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
@@ -266,7 +268,8 @@ default ResponseEntity<ModelApiResponse> uploadFileWithRequiredFile(@ApiParam(va
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeClassnameTestApi.java b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeClassnameTestApi.java
index d43199bbe13d..ba3d5a054ca8 100644
--- a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeClassnameTestApi.java
+++ b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeClassnameTestApi.java
@@ -52,7 +52,8 @@ default ResponseEntity<Client> testClassname(@ApiParam(value = "client model" ,r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/PetApi.java b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/PetApi.java
index adc1d0361250..9d2a8d3788a6 100644
--- a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/PetApi.java
+++ b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/PetApi.java
@@ -94,11 +94,13 @@ default ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "S
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -125,11 +127,13 @@ default ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tag
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -154,11 +158,13 @@ default ResponseEntity<Pet> getPetById(@ApiParam(value = "ID of pet to return",r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -224,7 +230,8 @@ default ResponseEntity<ModelApiResponse> uploadFile(@ApiParam(value = "ID of pet
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/StoreApi.java b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/StoreApi.java
index d7c3e5ad9863..4d1986221f44 100644
--- a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/StoreApi.java
+++ b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/StoreApi.java
@@ -80,11 +80,13 @@ default ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -106,11 +108,13 @@ default ResponseEntity<Order> placeOrder(@ApiParam(value = "order placed for pur
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/UserApi.java b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/UserApi.java
index f660e7a899e2..3dea9f76518c 100644
--- a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/UserApi.java
+++ b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/UserApi.java
@@ -101,11 +101,13 @@ default ResponseEntity<User> getUserByName(@ApiParam(value = "The name that need
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                    String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                    String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/AnotherFakeApi.java b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/AnotherFakeApi.java
index 9a93b057baad..9c42b1915cf8 100644
--- a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/AnotherFakeApi.java
+++ b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/AnotherFakeApi.java
@@ -46,7 +46,8 @@ default ResponseEntity<Client> call123testSpecialTags(@ApiParam(value = "client
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeApi.java b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeApi.java
index 57da91087ca6..b51f20e16123 100644
--- a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeApi.java
+++ b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeApi.java
@@ -79,7 +79,8 @@ default ResponseEntity<OuterComposite> fakeOuterCompositeSerialize(@ApiParam(val
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
-                    ApiUtil.setExampleResponse(request, "*/*", "{  \"my_string\" : \"my_string\",  \"my_number\" : 0.8008281904610115,  \"my_boolean\" : true}");
+                    String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
+                    ApiUtil.setExampleResponse(request, "*/*", exampleString);
                     break;
                 }
             }
@@ -148,7 +149,8 @@ default ResponseEntity<Client> testClientModel(@ApiParam(value = "client model"
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
@@ -248,7 +250,8 @@ default ResponseEntity<ModelApiResponse> uploadFileWithRequiredFile(@ApiParam(va
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeClassnameTestApi.java b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
index 483949a5cb6b..71fc4168f87c 100644
--- a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
+++ b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeClassnameTestApi.java
@@ -48,7 +48,8 @@ default ResponseEntity<Client> testClassname(@ApiParam(value = "client model" ,r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"client\" : \"client\"}");
+                    String exampleString = "{ \"client\" : \"client\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/PetApi.java b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/PetApi.java
index be0c56e311ed..d0f2893bda61 100644
--- a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/PetApi.java
+++ b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/PetApi.java
@@ -88,11 +88,13 @@ default ResponseEntity<List<Pet>> findPetsByStatus(@NotNull @ApiParam(value = "S
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -118,11 +120,13 @@ default ResponseEntity<List<Pet>> findPetsByTags(@NotNull @ApiParam(value = "Tag
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -146,11 +150,13 @@ default ResponseEntity<Pet> getPetById(@ApiParam(value = "ID of pet to return",r
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ],  \"name\" : \"doggie\",  \"id\" : 0,  \"category\" : {    \"name\" : \"default-name\",    \"id\" : 6  },  \"tags\" : [ {    \"name\" : \"name\",    \"id\" : 1  }, {    \"name\" : \"name\",    \"id\" : 1  } ],  \"status\" : \"available\"}");
+                    String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Pet>  <id>123456789</id>  <name>doggie</name>  <photoUrls>    <photoUrls>aeiou</photoUrls>  </photoUrls>  <tags>  </tags>  <status>aeiou</status></Pet>");
+                    String exampleString = "<Pet> <id>123456789</id> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> </tags> <status>aeiou</status> </Pet>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -213,7 +219,8 @@ default ResponseEntity<ModelApiResponse> uploadFile(@ApiParam(value = "ID of pet
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"code\" : 0,  \"type\" : \"type\",  \"message\" : \"message\"}");
+                    String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/StoreApi.java b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/StoreApi.java
index b9b13f85b21d..9fd364923e15 100644
--- a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/StoreApi.java
+++ b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/StoreApi.java
@@ -74,11 +74,13 @@ default ResponseEntity<Order> getOrderById(@Min(1L) @Max(5L) @ApiParam(value = "
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
@@ -99,11 +101,13 @@ default ResponseEntity<Order> placeOrder(@ApiParam(value = "order placed for pur
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"petId\" : 6,  \"quantity\" : 1,  \"id\" : 0,  \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\",  \"complete\" : false,  \"status\" : \"placed\"}");
+                    String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<Order>  <id>123456789</id>  <petId>123456789</petId>  <quantity>123</quantity>  <shipDate>2000-01-23T04:56:07.000Z</shipDate>  <status>aeiou</status>  <complete>true</complete></Order>");
+                    String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }
diff --git a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/UserApi.java b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/UserApi.java
index 4e63f5635ff7..bcaa945800f9 100644
--- a/samples/server/petstore/springboot/src/main/java/org/openapitools/api/UserApi.java
+++ b/samples/server/petstore/springboot/src/main/java/org/openapitools/api/UserApi.java
@@ -93,11 +93,13 @@ default ResponseEntity<User> getUserByName(@ApiParam(value = "The name that need
         getRequest().ifPresent(request -> {
             for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
-                    ApiUtil.setExampleResponse(request, "application/json", "{  \"firstName\" : \"firstName\",  \"lastName\" : \"lastName\",  \"password\" : \"password\",  \"userStatus\" : 6,  \"phone\" : \"phone\",  \"id\" : 0,  \"email\" : \"email\",  \"username\" : \"username\"}");
+                    String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                     break;
                 }
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
-                    ApiUtil.setExampleResponse(request, "application/xml", "<User>  <id>123456789</id>  <username>aeiou</username>  <firstName>aeiou</firstName>  <lastName>aeiou</lastName>  <email>aeiou</email>  <password>aeiou</password>  <phone>aeiou</phone>  <userStatus>123</userStatus></User>");
+                    String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
+                    ApiUtil.setExampleResponse(request, "application/xml", exampleString);
                     break;
                 }
             }