}

  /**
   * Delegates to {@link Map#remove}. Returns {@code null} on {@code ClassCastException} and {@code
   * NullPointerException}.
   */
  @CheckForNull
  static <V extends @Nullable Object> V safeRemove(Map<?, V> map, @CheckForNull Object key) {
    checkNotNull(map);
    try {
      return map.remove(key);
    } catch (ClassCastException | NullPointerException e) {
      return null;
    }
  }

  }

  /**
   * Delegates to {@link Map#remove}. Returns {@code null} on {@code ClassCastException} and {@code
   * NullPointerException}.
   */
  @CheckForNull
  static <V extends @Nullable Object> V safeRemove(Map<?, V> map, @CheckForNull Object key) {
    checkNotNull(map);
    try {
      return map.remove(key);
    } catch (ClassCastException | NullPointerException e) {
      return null;
    }
  }