, callback, errCallback);
        }
      }
    },
    privateFunctions: {
      /*
        @function (private) _setUpTree
        @description Set up the tree util configuration
      */
      setUpTree: function () {
        var el = this;
        // Create declarative or store based tree
        if (el.store) {
          el._setupStore();
        }
      },
      /*
        @function (private) _setupStore
        @description Set up store integration
      */
      setupStore: function () {
        var e