public void call(VarContain args, VarContain rets) {
    if(args.length()!=this.args) {
      System.out.printf("wow. much args.\n");
      System.exit(-1);
    }
    if(rets.length()!=this.returns) {
      System.out.printf("wow. much returns.\n");
      System.exit(-1);
    }
    for(String s:code) {
      
    }
  }