# `GSInterpolationFontProxy fontMasterForId:`

*Instance Method*

## Declaration

```swift
func fontMaster(forId masterID: String?) -> GSFontMaster?
```

```objc
- (GSFontMaster *) fontMasterForId:(NSString *) masterID;
```

```python
fontMasterForId_(masterID: str) -> GSFontMaster
```