code: function (hash) {
      this.actionQueue.push(this.webdriverClient.source.bind(this.webdriverClient));
      this.actionQueue.push(this._sourceCb.bind(this, hash));
      return this;
    }
docs: Gets the HTML source of a page
  
  @method source
  @param {string} hash Unique hash of that fn call
  @chainable