**Describe the bug** 1. 当前像官方的SortableJS 给的嵌套拖拽示例的时候，之间报错了 期望： 1. 希望官方给出一个嵌套拖拽的示例 2. react-sortablejs 渲染的节点希望能支持原生元素的所有属性，比如dataSet属性等 依赖版本： "sortablejs": "^1.15.2" "react-sortablejs": "^6.1.4", "react": "^18.0.0", "react-dom": "^18.0.0", 报错如下 1：跨组拖拽的 react-sortable.tsx:241 Uncaught TypeError: Cannot convert undefined or null to object at Function.assign (<anonymous>) at react-sortable.tsx:241:14 at Array.map (<anonymous>) at $7fe8e3ea572bda7a$export$11bbed9ee0012c13.onAdd (react-sortable.tsx:240:63) at Sortable.<anonymous> (react-sortable.tsx:211:12) at dispatchEvent (sortable.esm.js:829:21) at _dispatchEvent (sortable.esm.js:873:3) at Sortable._onDrop (sortable.esm.js:1969:13) at Sortable.handleEvent (sortable.esm.js:2052:14) 报错信息2：跨组拖拽的 react-sortable.tsx:236 Uncaught TypeError: Cannot read properties of null (reading 'props') at $7fe8e3ea572bda7a$export$11bbed9ee0012c13.onAdd (react-sortable.tsx:236:43) at Sortable.<anonymous> (react-sortable.tsx:211:12) at dispatchEvent (sortable.esm.js:829:21) at _dispatchEvent (sortable.esm.js:873:3) at Sortable._onDrop (sortable.esm.js:1969:13) at Sortable.handleEvent (sortable.esm.js:2052:14