dist/vue-draggable-nested-tree.es.js
function targetNodeIsLastChild(info) {
    return findChild(info, info.targetNode.parent.children, function (v) {
      return v;
    }, true) === info.targetNode;
  }
function targetNodeIsLastChild(info) {
    return findChild(info, info.targetNode.parent.children, function (v) {
      return v;
    }, true) === info.targetNode;
  }
另一节点是最后节点