Method emit

lib/internal/event_target.js:1003–1010

* @param {string} type * @param {any} arg * @returns {boolean}

(type, arg)

   * @returns {boolean}
   */
  emit(type, arg) {
    if (!isNodeEventTarget(this))
      throw new ERR_INVALID_THIS('NodeEventTarget');
    validateString(type, 'type');
    const hadListeners = this.listenerCount(type) > 0;
    this[kHybridDispatch](arg, type);
    return hadListeners;
  }

  /**
   * @param {string} type