---
title: library
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/lowlevelmaterialresource/geometrymodifier/descriptor/library
---

# library

The Metal library that contains the function.

## Declaration

```swift
var library: any MTLLibrary { get set }
```

## See Also

### Inspecting the configuration

- [constantValues](realitykit/lowlevelmaterialresource/geometrymodifier/descriptor/constantvalues.md)