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# Changes
- Adds a new function `egui::Ui::columns_const()`, which is the same as
`egui::Ui::columns()` except that it uses a `const` parameter for the
column count.
- Backed by an array `[Ui; NUM_COL] instead of a `Vec<Ui>`, so fewer
allocations
- Inner closure takes in an array reference, instead of a slice
reference. This makes it possible to use pattern destructuring on the
columns, as shown in the example, and makes it more ergonomic to use
# Example
```rust
// ORIGINAL
ui.columns(2, |cols| {
cols[0].label("one");
cols[1].label("two");
});
// NEW
ui.columns_const(|[a,b]| {
a.label("one");
b.label("two");
});
```
# Checks
- [X] `cargo fmt`
- [X] `cargo clippy`
- [X] `./scripts/check.sh`
- [X] Docs
- [ ] Review