*/
  private static <K extends @Nullable Object, V extends @Nullable Object>
      Collection<Entry<K, V>> unmodifiableEntries(Collection<Entry<K, V>> entries) {
    if (entries instanceof Set) {
      return Maps.unmodifiableEntrySet((Set<Entry<K, V>>) entries);
    }
    return new Maps.UnmodifiableEntries<>(Collections.unmodifiableCollection(entries));
  }

  /**

      }
    };
  }

  /** The implementation of {@link Multimaps#unmodifiableEntries}. */
  static class UnmodifiableEntries<K extends @Nullable Object, V extends @Nullable Object>
      extends ForwardingCollection<Entry<K, V>> {
    private final Collection<Entry<K, V>> entries;

    UnmodifiableEntries(Collection<Entry<K, V>> entries) {
      this.entries = entries;
    }

    @Override