@Override
  public int compare(Object left, Object right) {
    return left.toString().compareTo(right.toString());
  }

  // preserve singleton-ness, so equals() and hashCode() work correctly
  private Object readResolve() {
    return INSTANCE;

            

Reported by PMD.

                  }
  }

  private static final class WrapperException extends Exception {
    WrapperException(Throwable t) {
      super(t);
    }
  }


            

Reported by PMD.

               */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public class ExecutionError extends Error {
  /*
   * Ideally, this class would have exposed only constructors that require a non-null cause. We
   * might try to move in that direction, but there are complications. See
   * https://github.com/jspecify/nullness-checker-for-checker-framework/blob/61aafa4ae52594830cfc2d61c8b113009dbdb045/src/main/java/com/google/jspecify/nullness/NullSpecTransfer.java#L789
   */

            

Reported by PMD.

               * <p>TODO(cpovirk): Consider applying this subclass approach to our other types.
 */
@GwtCompatible(emulated = true)
abstract class HashMultimapGwtSerializationDependencies<K, V> extends AbstractSetMultimap<K, V> {
  HashMultimapGwtSerializationDependencies(Map<K, Collection<V>> map) {
    super(map);
  }
}

            

Reported by PMD.

              
  private static final int MAX_TABLE_SIZE = Ints.MAX_POWER_OF_TWO;

  static int closedTableSize(int expectedEntries, double loadFactor) {
    // Get the recommended table size.
    // Round down to the nearest power of 2.
    expectedEntries = Math.max(expectedEntries, 2);
    int tableSize = Integer.highestOneBit(expectedEntries);
    // Check to make sure that we will not exceed the maximum load factor.

            

Reported by PMD.

              @ElementTypesAreNonnullByDefault
abstract class TransformedIterator<F extends @Nullable Object, T extends @Nullable Object>
    implements Iterator<T> {
  final Iterator<? extends F> backingIterator;

  TransformedIterator(Iterator<? extends F> backingIterator) {
    this.backingIterator = checkNotNull(backingIterator);
  }


            

Reported by PMD.

              /** @author Colin Decker */
public class TestReader extends FilterReader {

  private final TestInputStream in;

  public TestReader(TestOption... options) throws IOException {
    this(new TestInputStream(new ByteArrayInputStream(new byte[10]), options));
  }


            

Reported by PMD.

              /** @author Colin Decker */
public class TestWriter extends FilterWriter {

  private final TestOutputStream out;

  public TestWriter(TestOption... options) throws IOException {
    this(new TestOutputStream(ByteStreams.nullOutputStream(), options));
  }


            

Reported by PMD.

              @GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class CollectionSerializationTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SERIALIZABLE)
  public void testReserialize() {
    // For a bare Collection, the most we can guarantee is that the elements are preserved.
    Helpers.assertEqualIgnoringOrder(
        actualContents(), SerializableTester.reserialize(actualContents()));
  }

            

Reported by PMD.

              @GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class CollectionSerializationEqualTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SERIALIZABLE)
  public void testReserialize() {
    assertEquals(SerializableTester.reserialize(actualContents()), actualContents());
  }
}

            

Reported by PMD.