Method setResult

lib/operation-state.js:154–157

* Sets the result of this operation, declaring that no further input will be processed for this operation. * @param {Error} err * @param {Object} [result] * @param {Number} [length]

(err, result, length)

   * @param {Number} [length]
   */
  setResult(err, result, length) {
    this._markAsCompleted();
    this._swapCallbackAndInvoke(err, result, length);
  }

  _swapCallbackAndInvoke(err, result, length, newCallback) {
    const callback = this._callback;