/guava/guava/src/com/google/common/graph/DirectedGraphConnections.java
return successorValue == null ? null : ( V) removedValue;
return removedValue == null ? null : ( V ) removedValue;
if (removedValue != null) { checkNonNegative(--successorCount); if (orderedNodeConnections != null) { orderedNodeConnections.remove(new NodeConnection.Succ<>((N) node)); } } <extra_id_0> } @Override public void addPredecessor(N node, V unused) { Object previousValue = adjacentNodeValues.put(node, PRED); boolean addedPredecessor; if (previousValue == null) {