# PreviewMacroBodyBuilder Builder for preview body content within a `#Preview` macro. ``` @resultBuilder struct PreviewMacroBodyBuilder ``` ## Overview> Warning: Using this builder outside of a `#Preview` macro will produce a fatal error. ## Topics ### Type Methods [`static func buildBlock(Content) -> Content`](/documentation/DeveloperToolsSupport/PreviewMacroBodyBuilder/buildBlock(_:)) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)