/guava/guava/src/com/google/common/graph/StandardNetwork.java
return nodeInvalidatableSet ( checkedConnections ( node ) .incidentEdges ( ) , node ) ;
@Override public ElementOrder<E> edgeOrder() { return edgeOrder; } @Override public Set<E> incidentEdges(N node) { <extra_id_0> } @Override public EndpointPair<N> incidentNodes(E edge) { N nodeU = checkedReferenceNode(edge); N nodeV = requireNonNull(nodeConnections.get(nodeU)).adjacentNode(edge); return EndpointPair.of(this, nodeU, nodeV);