disableEventListeners() {\n    return disableEventListeners.call(this);\n  }\n\n  /**\n   * Schedules an update. It will run on the next UI update available.\n   * @method scheduleUpdate\n   * @memberof Popper\n   */\n  scheduleUpdate = () => requestAnimationFrame(this.update);\n\n  /**\n   * Collection of utilities useful when writing custom modifiers.\n   * Starting from version 1.7, this method is available only if you\n   * include `popper-utils.js` before `popper.js`.\n   *\n   * **DEPRECATION**:...