# Replace with title of breaking change

> Brief description similar to the "context" section below. Text should break at 80 chars or less.




:::important
These breaking change docs are accurate, as of the release
under which they are published. Over time, the
workarounds described here might become inaccurate.
We don't, in general, keep these breaking change docs up
to date as of each release.

这些破坏性改动文档的准确性仅限于其发布时对应的版本。
随着时间的推移，文档中描述的方案可能会逐渐失效。
通常情况下，我们不会在每次发布新版本时都对这些文档进行同步更新。

The [breaking change index file](/release/breaking-changes)
lists the docs created for each release.

[破坏性改动列表](/release/breaking-changes) 
列出了每个版本的文档。

:::




## Summary



## Background



## Migration guide



Code before migration:

```dart
// Example of code before the change.
```

Code after migration:

```dart
// Example of code after the change.
```



## Timeline



Landed in version: xxx<br>
In stable release: Not yet
Reverted in version: xxx  (OPTIONAL, delete if not used)

## References