public void visit(AbsFunCall acceptor) {
   Frame frame = frms.peek();
   frame.ensureOutArgsSize(acceptor.args.exprs.size() * 4 + 4);
   for (AbsExpr arg : acceptor.args.exprs) arg.accept(this);
 }
 public void visit(AbsExprs acceptor) {
   for (AbsExpr expr : acceptor.exprs) expr.accept(this);
 }