# Deprecate MemoryAllocations in favor of FlutterMemoryAllocations

> MemoryAllocations is renamed to FlutterMemoryAllocations.




:::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

Disposables in pure Dart projects can't use `MemoryAllocations` in Flutter.
So, to be leak-trackable they need a Dart-only class.
`MemoryAllocations` in Flutter is renamed to make the name
available to a non-Flutter, Dart project.

## Migration guide

Before:

```dart
if (kFlutterMemoryAllocationsEnabled) {
  MemoryAllocations.instance.dispatchObjectCreated(
    library: 'package:flutter/gestures.dart',
    className: '$MultiDragPointerState',
    object: this,
  );
}
```

After:

```dart
if (kFlutterMemoryAllocationsEnabled) {
  FlutterMemoryAllocations.instance.dispatchObjectCreated(
    library: 'package:flutter/gestures.dart',
    className: '$MultiDragPointerState',
    object: this,
  );
}
```

## Timeline

Landed in version: 3.19.0-2.0.pre<br>
Landed in stable: 3.22.0

## References

Relevant issues:

* [Rename MemoryAllocations to FlutterMemoryAllocations (Issue 140622)][]

[Rename MemoryAllocations to FlutterMemoryAllocations (Issue 140622)]: https://github.com/flutter/flutter/issues/140622