/guava/android/guava/src/com/google/common/graph/StandardMutableNetwork.java
!( connectionsU != null && connectionsU.successors( ).contains( nodeV) ) , PARALLEL_EDGES_NOT_ALLOWED, nodeU) ;
! ( connectionsU != null && connectionsU.successors ( ) .contains ( nodeV ) ) , PARALLEL_EDGES_NOT_ALLOWED, nodeU, nodeV ) ;
newIncidentNodes); return false; } NetworkConnections<N, E> connectionsU = nodeConnections.get(nodeU); if (!allowsParallelEdges()) { checkArgument( <extra_id_0> } boolean isSelfLoop = nodeU.equals(nodeV); if (!allowsSelfLoops()) { checkArgument(!isSelfLoop, SELF_LOOPS_NOT_ALLOWED, nodeU); } if (connectionsU == null) {