return standardContainsAll(collection);
      }

      @Override
      public boolean remove(@Nullable Object object) {
        return object != null && Collections2.safeRemove(delegate, object);
      }

      @Override
      public boolean removeAll(Collection<?> c) {
        return standardRemoveAll(c);
      }
    };
  }

  @Override

    }
  }

  /**
   * Delegates to {@link Collection#remove}. Returns {@code false} if the {@code remove} method
   * throws a {@code ClassCastException} or {@code NullPointerException}.
   */
  static boolean safeRemove(Collection<?> collection, @Nullable Object object) {
    checkNotNull(collection);
    try {
      return collection.remove(object);
    } catch (ClassCastException | NullPointerException e) {
      return false;

    }
  }

  /** Removes all values for the provided key. */
  private void removeValuesForKey(@Nullable Object key) {
    Collection<V> collection = Maps.safeRemove(map, key);

    if (collection != null) {
      int count = collection.size();
      collection.clear();
      totalSize -= count;
    }
  }