code: function() {
          this.cal.beforeRenderNavEvent.fire();
          if (!this.__rendered) {
              this.createNav();
              this.createMask();
              this.applyListeners();
              this.__rendered = true;
          }
          this.cal.renderNavEvent.fire();
      }
docs: Renders the HTML for the navigator, adding it to the
  document and attaches event listeners if it has not
  already been rendered.
  
  @method render