# `GSFeaturePrefix`

*Class*

The class defining the Prefix object

## Declaration

```swift
class GSFeaturePrefix
```

```objc
@interface GSFeaturePrefix : GSClass
```

```python
class GSFeaturePrefix(GSClass)
```

## Overview

Is used to store lookups or similar data.

## Topics

### Instance Methods

- [`GSFeaturePrefix isEqualToPrefix:`](/Core/GlyphsCore/GSFeaturePrefix/isEqualToPrefix:)

## Relationships

### Inherits From

- [`GSClass`](/Core/GlyphsCore/GSClass)

## See Also

### Layout Features

- [`GSFeaBlock`](/Core/GlyphsCore/GSFeaBlock) — A snippet of feature code.
- [`GSClass`](/Core/GlyphsCore/GSClass) — The class represents the OpenType classes
- [`GSFeature`](/Core/GlyphsCore/GSFeature) — The class defining the feature object