code: function (applet_name) {
  
          // See if we have an instance loaded already
          var applet = _.find(_kiwi.app.panels('applets'), function(panel) {
              // Ignore if it's not an applet
              if (!panel.isApplet()) return;
  
              // Ignore if it doesn't have an applet loaded
              if (!panel.loaded_applet) return;
  
              if (panel.loaded_applet.get('_applet_name') === applet_name) {
                  return true;
              }
          });
  
          if (applet) return applet;
  
  
          // If we didn't find an instance, load a new one up
          return this.load(applet_name);
      }
docs: Load an applet type once only. If it already exists, return that