text: class YaksokList extends Array {
      get 길이() {
          return (this[0] === void 0) ? this.length - 1 : this.length;
      }
      *[Symbol.iterator]() {
          for (
              let i = this[0] === void 0 ? 1 : 0;
              i < this.length;
              ++i
          ) yield this[i];
      }
      toJsArray() {
          let copy = this.slice();
          copy.shift();
          return copy;
      }
  }
  YaksokList.prototype.isYaksokList = true;
  function yaksokList(array) {
      array.constructor = YaksokList;
      array.__proto__ = YaksokList.prototype;
      return array;
  }
  