/guava/android/guava/src/com/google/common/graph/DirectedGraphConnections.java
boolean added = seenNodes.add( nodeConnection.node.node) ;
boolean added = seenNodes.add ( nodeConnection.node ) ;
return new AbstractIterator<N>() { @Override @CheckForNull protected N computeNext() { while (nodeConnections.hasNext()) { NodeConnection<N> nodeConnection = nodeConnections.next(); <extra_id_0> if (added) { return nodeConnection.node; } } return endOfData(); }