---
title: "buildExpression(_:)"
framework: widgetkit
role: symbol
role_heading: Type Method
path: "widgetkit/previewactivitybuilder/buildexpression(_:)"
---

# buildExpression(_:)

## Declaration

```swift
static func buildExpression(_ contentState: A.ContentState) -> [A.ContentState]
```

## See Also

### Previewing Live Activities

- [buildArray(_:)](widgetkit/previewactivitybuilder/buildarray(_:).md)
- [buildPartialBlock(accumulated:next:)](widgetkit/previewactivitybuilder/buildpartialblock(accumulated:next:).md)
- [buildPartialBlock(first:)](widgetkit/previewactivitybuilder/buildpartialblock(first:).md)