public Object[] toArray() {
            return parent.toArray();
        }

        public <T> T[] toArray(final T[] a) {
            return parent.toArray(a);
        }

        public boolean add(final E e) {
            return parent.add(e);
        }

        public boolean remove(final Object o) {
            return parent.remove(o);
        }

     */
    public static final int DEFAULT_SEND_CREDIT_TARGET = 32;

    /**
     * Default maximum receive size (8KB)
     */
    public static final int DEFAULT_MAX_RECEIVE_SIZE = 8192;

    /**
     * Default maximum fragmented size (128KB)
     */
    public static final int DEFAULT_MAX_FRAGMENTED_SIZE = 131072; // 128KB

    /**
     * Default maximum read/write size (1MB)
     */

   * the JDK {@link java.util.function.Function} class, see {@link Function}.
   */
  public static Function<Object, String> toStringFunction() {
    return ToStringFunction.INSTANCE;
  }

  // enum singleton pattern
  private enum ToStringFunction implements Function<Object, String> {
    INSTANCE;

    @Override
    public String apply(Object o) {
      checkNotNull(o); // eager for GWT.
      return o.toString();
    }

    }

    @Override
    public boolean addAll(Collection<? extends T> collection) {
      return standardAddAll(collection);
    }

    @Override
    public void clear() {
      standardClear();
    }

    @Override
    public boolean contains(Object object) {
      return standardContains(object);
    }

    @Override
    public boolean containsAll(Collection<?> collection) {

/**
 * Test class for ContentCache.
 * Tests memory-based and file-based content caching.
 */
public class ContentCacheTest {

    private File tempFile;

    @After
    public void tearDown() {
        if (tempFile != null && tempFile.exists()) {
            tempFile.delete();
        }
    }

    @Test
    public void testMemoryBasedCacheConstructor() {
        byte[] data = "Hello, World!".getBytes();

    public <T extends @Nullable Object> T[] toArray(T[] array) {
      return standardToArray(array);
    }

    @Override
    public boolean contains(@Nullable Object o) {
      return Maps.containsEntryImpl(delegate(), o);
    }

    @Override
    public boolean containsAll(Collection<?> c) {
      return standardContainsAll(c);
    }

    @Override

        @Override
        public void insert(User user) {
            insertCalled = true;
            insertedUser = user;
        }

        @Override
        public void delete(User user) {
            deleteCalled = true;
            deletedUser = user;
        }

        @Override
        public boolean changePassword(String username, String password) {

  }

  /** constructor initializes to given value */
  public void testConstructor() {
    for (double x : VALUES) {
      AtomicDouble a = new AtomicDouble(x);
      assertBitEquals(x, a.get());
    }
  }

  /** default constructed initializes to zero */
  public void testConstructor2() {
    AtomicDouble a = new AtomicDouble();
    assertBitEquals(0.0, a.get());
  }

    public static final ParseField FEATURESET_NAME = new ParseField("featureset");
    /** The parse field for the store name. */
    public static final ParseField STORE_NAME = new ParseField("store");
    /** The parse field for the query parameters. */
    public static final ParseField PARAMS = new ParseField("params");
    /** The parse field for the active features. */
    public static final ParseField ACTIVE_FEATURES = new ParseField("active_features");

  @J2ktIncompatible
  @GwtIncompatible // threads
  public void testAllAsList_extensive() throws InterruptedException {
    runExtensiveMergerTest(Merger.allMerger);
  }

  @J2ktIncompatible
  @GwtIncompatible // threads
  public void testSuccessfulAsList_extensive() throws InterruptedException {
    runExtensiveMergerTest(Merger.successMerger);
  }

  public void testSuccessfulAsList() throws Exception {