想做一个自动保存schema到本地的功能，想知道有没有API可以获取面板的编辑事件

如题，想请教一下哪个API我可以知道用户编辑了内容（例如拖拽了一个节点），API大概是这个样子的

```js
xxx.on('change', () => {
console.log('save updated schema to local environment')
})
```

Start by locating the panel API and the schema update path related to user edits, including node dragging. Determine whether an edit event is already exposed and define what event payload and save behavior are required. Done means the supported API and its behavior are documented or implemented with a clear way to detect schema changes.

Written by the indexing model from the issue text.