: unmodifiableSet(Sets.filter(inEdgesV, connectedPredicate(nodeV, nodeU))),
        nodeU,
        nodeV);
  }

  @Override
  public Set<E> edgesConnecting(EndpointPair<N> endpoints) {
    validateEndpoints(endpoints);
    return edgesConnecting(endpoints.nodeU(), endpoints.nodeV());
  }

  private Predicate<E> connectedPredicate(final N nodePresent, final N nodeToCheck) {
    return new Predicate<E>() {

            : unmodifiableSet(Sets.filter(inEdgesV, connectedPredicate(nodeV, nodeU))),
        nodeU,
        nodeV);
  }

  @Override
  public Set<E> edgesConnecting(EndpointPair<N> endpoints) {
    validateEndpoints(endpoints);
    return edgesConnecting(endpoints.nodeU(), endpoints.nodeV());
  }

  private Predicate<E> connectedPredicate(final N nodePresent, final N nodeToCheck) {
    return new Predicate<E>() {