[ggj][codegen][test] feat: ServiceClientTest.rpcExceptionTest support…

… for LRO, streaming (#350)

* fix!: refactor field into MethodArgument, add enum/msg flags

* feat: partial isAssignableFrom VaporRef support, enable full-name type usage

* feat: support negative numeric literals

* fix: separate resname tokenizing from class composer

* feat: add per-type default value composer

* feat: add ServiceClientTest.methodExceptionTests codegen

* feat: add rpcExceptionTest for RPCs w/o overloads, support LRO

* fix: CI merge

* feat: ServiceClientTest.rpcExceptionTest support for LRO, streaming

* fix: sorted method args

src/main/java/com/google/api/generator/engine/ast/VaporReference.java

@@ -78,7 +78,14 @@ public boolean isFromPackage(String pkg) {
   @Override
   public boolean isSupertypeOrEquals(Reference other) {
     // Not handling more complex cases for VaporReference.
-    return equals(other);
+    if (!(other instanceof VaporReference)) {
+      return false;
+    }
+
+    VaporReference ref = (VaporReference) other;
+    return pakkage().equals(ref.pakkage())
+        && plainName().equals(ref.plainName())
+        && Objects.equals(enclosingClassName(), ref.enclosingClassName());
   }
 
   @Override