Method _markRequested

lib/hccrawler.js:495–499

* @param {!Object} options * @return {!Promise} * @private

(options)

   * @private
   */
  async _markRequested(options) {
    if (!options.skipDuplicates) return;
    const key = generateKey(options);
    await this._cache.set(key, '1');
  }

  /**
   * @param {!Object} options