code: function () {
          var self = this, i, state = self._super();
  
          i = visiblePanels.length;
          while (i--) {
            if (visiblePanels[i] === self) {
              break;
            }
          }
  
          if (i === -1) {
            visiblePanels.push(self);
          }
  
          return state;
        }
docs: Shows the current float panel.
  
  @method show
  @return {tinymce.ui.FloatPanel} Current floatpanel instance.