Cd_graph{
    void flatten() to Neighbors_wc { 
	{{	
	    Any_vertex_List common;
	    Ident currentSource;
	    HashMap adjacency_wc = new HashMap();
	}}
	
	before Adjacency {{
	    currentSource = host.get_source().get_vertex_name();
	}}
	
	before Neighbors_wc {{
	    common = host.get_construct_ns();
	    if(adjacency_wc.containsKey(currentSource)){
		Any_vertex_List tempList = (Any_vertex_List)adjacency_wc.get(currentSource);
		while(tempList.hasMoreElements()){
		    common.addElement((Any_vertex)tempList.nextElement());
		}
		host.set_construct_ns(common);
	    }
	}}

	before Alternat_ns {{
	    Enumeration en = host.get_alternat_ns().elements();
	    while( en.hasMoreElements() ){
		adjacency_wc.put( ( (Term)en.nextElement() ).get_vertex().get_vertex_name(), common);
	    }
	}}
    }
}