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# CIPlugInRegistration

The interface for loading Core Image image units.

```
protocol CIPlugInRegistration
```

## Overview

The principal class of an image unit—a loadable bundle containing custom Core Image filters for macOS—must support this protocol.

## Topics

### Initializing Plug-ins

[`load(_:)`](/documentation/CoreImage/CIPlugInRegistration/load(_:))

Loads and initializes an image unit, performing custom tasks as needed.


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