text: pimcore.registerNS("Formbuilder.comp.filter.callback");
  Formbuilder.comp.filter.callback = Class.create(Formbuilder.comp.filter.base,{
  
      type: "callback",
  
      initialize: function (treeNode, initData, parent) {
          this.treeNode = treeNode;
          this.initData(initData);
      },
  
      getTypeName: function () {
          return t("callback");
      },
  
      getIconClass: function () {
          return "Formbuilder_icon_filter";
      },
  
      getForm: function($super){
          $super();
          var thisNode = new Ext.form.FieldSet({
              title: t("This node"),
              collapsible: true,
              defaultType: 'textfield',
              items:[{
                  xtype: "textfield",
                  name: "callback",
                  fieldLabel: t("Callback"),
                  anchor: "100%",
                  value: this.datax.callback
              }
          ]
          });
  
          this.form.add(thisNode);
  
          return this.form;
      }
  
  });