Method has

javascript/selenium-webdriver/lib/capabilities.js:312–314

* @param {string} key the key to test. * @return {boolean} whether this capability set has the specified key.

(key)

   * @return {boolean} whether this capability set has the specified key.
   */
  has(key) {
    return this.map_.has(key)
  }

  /**
   * @return {!Iterator<string>} an iterator of the keys set.