DirectedMultiNetworkConnections.java 文件源码

@Override
public N removeInEdge(Object edge, boolean isSelfLoop) {
  N node = super.removeInEdge(edge, isSelfLoop);
  Multiset<N> predecessors = getReference(predecessorsReference);
  if (predecessors != null) {
    checkState(predecessors.remove(node));
  }
  return node;
}