maybe have a bug in the getOptions method

[HalleyLi]

because in the method you first use JSON.stringify(config) and the last you return result; resulting in that when I modify the treeData; the result is constant ; so the $scope.$watch(getOptions()) method is not correct;I can't normally destroy() and init() the tree;

[ezraroi]

Please write a plunker that reproduce this, i have used it for 2 years with no problems