diff --git a/android/guava-tests/test/com/google/common/base/OptionalTest.java b/android/guava-tests/test/com/google/common/base/OptionalTest.java
index 0541d4d6ce50..5d94ab6126ab 100644
--- a/android/guava-tests/test/com/google/common/base/OptionalTest.java
+++ b/android/guava-tests/test/com/google/common/base/OptionalTest.java
@@ -40,6 +40,7 @@
 @ElementTypesAreNonnullByDefault
 @GwtCompatible(emulated = true)
 public final class OptionalTest extends TestCase {
+
   public void testAbsent() {
     Optional<String> optionalName = Optional.absent();
     assertFalse(optionalName.isPresent());
diff --git a/guava/src/com/google/common/collect/ImmutableRangeMap.java b/guava/src/com/google/common/collect/ImmutableRangeMap.java
index 0d4d23976639..2ab707714eb6 100644
--- a/guava/src/com/google/common/collect/ImmutableRangeMap.java
+++ b/guava/src/com/google/common/collect/ImmutableRangeMap.java
@@ -294,6 +294,7 @@ public final void remove(Range<K> range) {
    *
    * @throws UnsupportedOperationException always
    * @deprecated Unsupported operation.
+   * @since 28.1
    */
   @Deprecated
   @Override
diff --git a/guava/src/com/google/common/collect/TreeRangeMap.java b/guava/src/com/google/common/collect/TreeRangeMap.java
index a4c26cb6ae78..dbcb82ea2e55 100644
--- a/guava/src/com/google/common/collect/TreeRangeMap.java
+++ b/guava/src/com/google/common/collect/TreeRangeMap.java
@@ -264,6 +264,9 @@ private void split(Cut<K> cut) {
     putRangeMapEntry(cut, rangeMapEntry.getUpperBound(), rangeMapEntry.getValue());
   }
 
+  /**
+   * @since 28.1
+   */
   @Override
   public void merge(
       Range<K> range,