code: function (selector, expected, hash) {
      this.actionQueue.push(this.webdriverClient.elements.bind(this.webdriverClient, selector));
      this.actionQueue.push(this._getNumberOfElementsCb.bind(this, selector, hash, expected));
      return this;
    }
docs: Returns the number of elements matched by the selector
  
  @method getNumberOfElements
  @param {string} selector Selector expression to find the elements
  @param {integer} expected Expected number of matched elements
  @param {string} uuid Unique hash of that fn call
  @chainable