---
title: "buildPartialBlock(first:)"
framework: swiftui
role: symbol
role_heading: Type Method
path: "swiftui/keyframetrackcontentbuilder/buildpartialblock(first:)"
---

# buildPartialBlock(first:)

## Declaration

```swift
static func buildPartialBlock<K>(first: K) -> K where Value == K.Value, K : KeyframeTrackContent
```

## See Also

### Building keyframe track content

- [buildArray(_:)](swiftui/keyframetrackcontentbuilder/buildarray(_:).md)
- [buildBlock()](swiftui/keyframetrackcontentbuilder/buildblock().md)
- [buildEither(first:)](swiftui/keyframetrackcontentbuilder/buildeither(first:).md)
- [buildEither(second:)](swiftui/keyframetrackcontentbuilder/buildeither(second:).md)
- [buildExpression(_:)](swiftui/keyframetrackcontentbuilder/buildexpression(_:).md)
- [buildPartialBlock(accumulated:next:)](swiftui/keyframetrackcontentbuilder/buildpartialblock(accumulated:next:).md)
- [KeyframeTrackContentBuilder.Conditional](swiftui/keyframetrackcontentbuilder/conditional.md)