* provided {@code standardOffer} method.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingBlockingDeque}.
 *
 * <p>The {@code standard} methods are not guaranteed to be thread-safe, even when all of the

  protected ForwardingObject() {}

  /**
   * Returns the backing delegate instance that methods are forwarded to. Abstract subclasses
   * generally override this method with an abstract method that has a more specific return type,
   * such as {@link ForwardingSet#delegate}. Concrete subclasses override this method to supply the
   * instance being decorated.
   */
  protected abstract Object delegate();

 * provided {@code standardAddAll} method.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingList}.
 *
 * <p>The {@code standard} methods and any collection views they return are not guaranteed to be

 * provided {@code standardAddAll} method.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingSortedSet}.
 *
 * <p>Each of the {@code standard} methods, where appropriate, uses the set's comparator (or the

   *
   * <p>The resulting collection's iterator does not support {@code remove()}, but all other
   * collection methods are supported. When given an element that doesn't satisfy the predicate, the
   * collection's {@code add()} and {@code addAll()} methods throw an {@link
   * IllegalArgumentException}. When methods such as {@code removeAll()} and {@code clear()} are

    return getMethod(methodName, arguments).invoke(lockLikeObject, arguments);
  }

  private Method getMethod(String methodName, Object... arguments) throws Exception {
    METHODS:
    for (Method method : lockLikeObject.getClass().getMethods()) {
      Class<?>[] parameterTypes = method.getParameterTypes();
      if (method.getName().equals(methodName) && (parameterTypes.length == arguments.length)) {

 * href="https://docs.oracle.com/javase/7/docs/api/java/util/ListIterator.html">before {@code
 * default} methods were introduced</a>. For newer methods, like {@code forEachRemaining}, it
 * inherits their default implementations. When those implementations invoke methods, they invoke
 * methods on the {@code ForwardingListIterator}.
 *
 * @author Mike Bostock
 * @since 2.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault

 * href="https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ConcurrentMap.html">before
 * {@code default} methods were introduced</a>. For newer methods, like {@code forEach}, it inherits
 * their default implementations. When those implementations invoke methods, they invoke methods on
 * the {@code ForwardingConcurrentMap}.
 *
 * @author Charles Fry
 * @since 2.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault

    Set<MethodSignature> methods = newHashSet();
    for (Class<?> clazz : getClassesBetween(descendant, ancestor)) {
      methods.addAll(getPublicStaticMethods(clazz));
    }
    return methods;
  }

  private static Set<MethodSignature> getPublicStaticMethods(Class<?> clazz) {
    Set<MethodSignature> publicStaticMethods = newHashSet();

    for (Method method : clazz.getDeclaredMethods()) {

    Set<MethodSignature> methods = newHashSet();
    for (Class<?> clazz : getClassesBetween(descendant, ancestor)) {
      methods.addAll(getPublicStaticMethods(clazz));
    }
    return methods;
  }

  private static Set<MethodSignature> getPublicStaticMethods(Class<?> clazz) {
    Set<MethodSignature> publicStaticMethods = newHashSet();

    for (Method method : clazz.getDeclaredMethods()) {