public Kopi2SIR(JCompilationUnit[] app) {
public Kopi2SIR() {
    public Kopi2SIR(JCompilationUnit[] app) {	parentStream = null;	topLevel = null;	currentMethod = null;	visitedSIROps = new Hashtable(100);	symbolTable = new Hashtable(300);	interfaceList = new Vector(100);	interfaceTableList = new Vector(100);        structureList = new Vector(100);	searchList = new LinkedList();	this.application = app;	initBuiltinFilters();	finalVars=new LinkedList();    }