public boolean visit(CharLiteral charLiteral, BlockScope scope) {
   this.collector.append("[v CL " + cut(charLiteral.toString()) + "]\n");
   return super.visit(charLiteral, scope);
 }
 public void endVisit(CharLiteral charLiteral, BlockScope scope) {
   this.collector.append("[ev CL " + cut(charLiteral.toString()) + "]\n");
   super.endVisit(charLiteral, scope);
 }