public static <N> EndpointPair<N> ordered(N source, N target) {
    return new Ordered<N>(source, target);
  }
public static <N> EndpointPair<N> ordered(N source, N target) {
    return new Ordered<N>(source, target);
  }
public static < N > EndpointPair < N > ordered ( N source , N target ) { return new Ordered < N > ( source , target ) ; }
Returns an {@link EndpointPair} representing the endpoints of a directed edge.
Returns an {