boolean isPartialView() {
    return false;
  }

  public final boolean isEmpty() {
    return delegate.isEmpty();
  }

  public final boolean containsKey(@Nullable Object key) {
    return Maps.safeContainsKey(delegate, key);
  }

  public final boolean containsValue(@Nullable Object value) {
    return delegate.containsValue(value);
  }

  public @Nullable V get(@Nullable Object key) {