# `GSLayer.upToDate`

*Instance Property*

Whether derived representations are newer than changes that affect the layer.

## Declaration

```swift
var isUpToDate: Bool { get }
```

```objc
@property (nonatomic, readonly, getter=isUpToDate) BOOL upToDate;
```

```python
isUpToDate() -> bool
```

## Discussion

Relevant changes include changes to the glyph, referenced content, and kerning.

## 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.
- [`GSLayer lastOperation:`](/Core/GlyphsCore/GSLayer/lastOperation:) — The most recent update affecting the layer or its referenced content, while avoiding component cycles.
- [`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.