# `GSLayer.lastOperation`

*Instance Property*

The most recent update affecting the layer or its referenced content.

## Declaration

```swift
var lastOperation: TimeInterval { get }
```

```objc
@property (nonatomic, readonly) NSTimeInterval lastOperation;
```

```python
lastOperation() -> float
```

## Discussion

Referenced content includes component and corner glyphs.

## See Also

### Update State

- [`GSLayer.lastUpdate`](/Core/GlyphsCore/GSLayer/lastUpdate) — The time of the most recent geometry invalidation.
- [`GSLayer lastOperation:`](/Core/GlyphsCore/GSLayer/lastOperation:) — The most recent update affecting the layer or its referenced content, while avoiding component cycles.
- [`GSLayer.upToDate`](/Core/GlyphsCore/GSLayer/upToDate) — Whether derived representations are newer than changes that affect the layer.
- [`GSLayer.isUpdatingMetrics`](/Core/GlyphsCore/GSLayer/isUpdatingMetrics) — Whether the layer is currently updating its side bearings.
- [`GSLayer.content`](/Core/GlyphsCore/GSLayer/content) — A KVO dependency key for changes to any content of the layer.