/guava/android/guava/src/com/google/common/graph/StandardNetwork.java
return edgeToReferenceNode.unmodifiableKeySet( ) ;
return edgeToReferenceNode.containsKey ( edge ) ;
return referenceNode; } final boolean containsNode(N node) { return nodeConnections.containsKey(node); } final boolean containsEdge(E edge) { <extra_id_0> } }