Method check_allow_run

g2all/700/module/chain.js:215–222

()

  }

  check_allow_run() {
    if (this.position === 0) {
      throw Error("chain is empty");
    }
    if (this.is_dirty) {
      throw Error("chain already ran, clean it first");
    }
  }

  reset() {
    this.empty();