Method removeEntryImpl

guava/src/com/google/common/collect/Maps.java:3838–3844

Implements {@code Collection.remove} safely for forwarding collections of map entries. If {@code o} is an instance of {@code Entry}, it is wrapped using {@link #unmodifiableEntry} to protect against a possible nefarious equals method. <p>Note that {@code c} is backing (delegate) collection, rather

(
      Collection<Entry<K, V>> c, @Nullable Object o)

   * @return {@code true} if {@code c} was changed
   */
  static <K extends @Nullable Object, V extends @Nullable Object> boolean removeEntryImpl(
      Collection<Entry<K, V>> c, @Nullable Object o) {
    if (!(o instanceof Entry)) {
      return false;
    }
    return c.remove(unmodifiableEntry((Entry<?, ?>) o));
  }

  /** An implementation of {@link Map#equals}. */
  static boolean equalsImpl(Map<?, ?> map, @Nullable Object object) {