public static HashSet getVars(FlatNode node, boolean countComplexAssignments)
public static HashSet getVars(JPhylum entry, boolean countComplexAssignments)
    public static HashSet getVars(FlatNode node, boolean countComplexAssignments)      {	VariablesUsed used = new VariablesUsed(countComplexAssignments);		if (node.isFilter()) {	    SIRFilter filter = (SIRFilter)node.contents;	    	    for (int i = 0; i < filter.getMethods().length; i++) {		filter.getMethods()[i].accept(used);	    }	    for (int i = 0; i < filter.getFields().length; i++) {		filter.getFields()[i].accept(used);	    }	}	return used.vars;    }