*
   * @since 27.1
   */
  @Override
  boolean hasEdgeConnecting(EndpointPair<N> endpoints);

  //
  // Graph identity
  //

  /**
   * Returns {@code true} iff {@code object} is a {@link Graph} that has the same elements and the
   * same structural relationships as those in this graph.
   *
   * <p>Thus, two graphs A and B are equal if <b>all</b> of the following are true:
   *