zng-app-context 0.9.0

Part of the zng project.
Documentation 
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This crate is part of the [`zng`](https://github.com/zng-ui/zng?tab=readme-ov-file#crates) project.


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## Cargo Features

 This crate provides 1 feature flag, not enabled by default.
#### `"multi_app"`
Allows multiple app instances per-process.

This feature allows multiple apps, one app per thread at a time. The `LocalContext` tracks
what app is currently running in each thread and `app_local!` statics switch to the value of each app
depending on the current thread.

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