# `GSLayer lockWriteMetrics`

*Instance Method*

Acquires the write lock for metrics.

## Declaration

```swift
func lockWriteMetrics()
```

```objc
- (void) lockWriteMetrics;
```

```python
lockWriteMetrics()
```

## See Also

### Metrics Locks

- [`GSLayer lockReadMetrics`](/Core/GlyphsCore/GSLayer/lockReadMetrics) — Acquires the read lock for metrics.
- [`GSLayer unlockReadMetrics`](/Core/GlyphsCore/GSLayer/unlockReadMetrics) — Releases the read lock for metrics.
- [`GSLayer unlockWriteMetrics`](/Core/GlyphsCore/GSLayer/unlockWriteMetrics) — Releases the write lock for metrics.