This crate is part of the [`zng`](https://github.com/zng-ui/zng?tab=readme-ov-file#crates) project. ## Cargo Features This crate provides 3 feature flags, 1 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. #### `"debug_default"` Enable `"multi_app"` in debug builds. *Enabled by default.* #### `"dyn_closure"` Box closures at opportune places, such as `Var::map`, reducing the number of monomorphised types. This speeds-up compilation time at the cost of runtime.