*/
  @Override
  public Set<EndpointPair<N>> edges() {
    return new AbstractSet<EndpointPair<N>>() {
      @Override
      public UnmodifiableIterator<EndpointPair<N>> iterator() {
        return EndpointPairIterator.of(AbstractBaseGraph.this);
      }

      @Override
      public int size() {
        return Ints.saturatedCast(edgeCount());
      }

      @Override
      public boolean remove(@Nullable Object o) {