code: function(options) {
          this._closing = true;
  
          callSuper(this, 'close');
  
          if (options && options.keepFocus && this.input) {
              this.input.focus();
          }
  
          this._closing = false;
      }
docs: @inherit
  
  @param options Optional options object. May contain the following property:
  keepFocus - If true, the focus will remain on the input.