How to use

edgeConnectingOrNull

method

in

com.google.common.graph.AbstractNetwork

@Override
public Optional<E> edgeConnecting(N nodeU, N nodeV) {
 return Optional.ofNullable(edgeConnectingOrNull(nodeU, nodeV));
}

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