question: public void walkGraph ( Hashtable semNodesTable ) { Integer uid = new Integer ( myUID ) ; if ( semNodesTable . get ( uid ) != null ) return ; semNodesTable . put ( new Integer ( myUID ) , this ) ; }
target:  Default implementations of walkGraph() to be inherited by subclasses of SemanticNode for implementing ExploreNode interface; the purpose of walkgraph is to find all reachable nodes in the semantic graph and insert them in a Hashtable for use by the Explorer tool.