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# performEditingTransaction(_:)

Performs an editing transaction and invokes a block upon completion.

```
func performEditingTransaction(_ transaction: () -> Void)
```

## Parameters

`transaction`

The editing transaction.

## Discussion

The primary [`NSTextLayoutManager`](/documentation/AppKit/NSTextLayoutManager) controlling the active editing transaction invokes this method. It’s possible to nest multiple editing transactions. The outer most transaction toggles `hasEditingTransaction` and sends synchronization messages if enabled after invoking a transaction.

---

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