How to use the ember-flexberry/objects/tree-node.create function in ember-flexberry

_jsTreeToFlexberryTree: function (jsTree) {
    if (!jsTree) return null;
    let ret = Ember.A([]);
    for (let i=0; i < jsTree.length; i++) {
      let node = jsTree[i];
      let caption = node.caption;
      let nodes = node.nodes;
      if (nodes && nodes.length > 0) {
        nodes = this._jsTreeToFlexberryTree(nodes);
      } else {
        nodes = Ember.A([]);
      }
      let treeNodeObject = TreeNodeObject.create({ caption: caption, nodes:nodes });
      ret.addObject(treeNodeObject);
    }
    return ret;
  },