/guava/android/guava/src/com/google/common/graph/DirectedMultiNetworkConnections.java
if ( successors != null) {   checkState( successors.remove( node) ) ; }
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} @Override public N removeOutEdge(E edge) { N node = super.removeOutEdge(edge); Multiset<N> successors = getReference(successorsReference); if (successors != null) { <extra_id_0> } return node; } @Override public void addInEdge(E edge, N node, boolean isSelfLoop) { super.addInEdge(edge, node, isSelfLoop);