+class Node<OtherNode extends Node>
+ implements IntegerMappable,
+ GraphViz.ToGraphViz {
+
+ protected FastSet<OtherNode> predecessors = new FastSet<OtherNode>();
+ protected FastSet<OtherNode> successors = new FastSet<OtherNode>();
+ //private HashSet<OtherNode> predecessors = new HashSet<OtherNode>();
+ //private HashSet<OtherNode> successors = new HashSet<OtherNode>();