# `GSGradientKnob performGradientModificationWithBlock:`

*Instance Method*

## Declaration

```swift
func performGradientModification(_ block: @escaping @Sendable (Any) -> Void)
```

```swift
func performGradientModification() async -> Any
```

```objc
- (void) performGradientModificationWithBlock:(void (^)(id )) block;
```

```python
performGradientModificationWithBlock_(: object, block)
```