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# makeDefaultLibrary(bundle:)

Creates a Metal library instance that contains the functions in a bundle’s default Metal library.

```
func makeDefaultLibrary(bundle: Bundle) throws -> any MTLLibrary
```

## Parameters

`bundle`

A bundle instance.

## Return Value

A new [`MTLLibrary`](/documentation/Metal/MTLLibrary) instance if the method completes successfully;
otherwise Swift throws an error and Objective-C returns `nil`.

## Discussion

---

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