# SFCustomLanguageModelData.TemplateInsertableBuilder A custom parameter attribute that constructs custom language model data from closures. ``` @resultBuilder struct TemplateInsertableBuilder ``` ## Overview Phrase counts can be generated manually by providing an exact phrase and weight (e.g. “Play the Albin counter gambit”) or from templates (e.g. “Move my to ”). Templates themselves can be constructed manually, or using the result builder DSL. This type supports the latter. ## Topics ### Result builder methods [`static func buildArray([any TemplateInsertable]) -> any TemplateInsertable`](/documentation/Speech/SFCustomLanguageModelData/TemplateInsertableBuilder/buildArray(_:)) Enables support for `for..in` loops. [`static func buildBlock(any TemplateInsertable...) -> any TemplateInsertable`](/documentation/Speech/SFCustomLanguageModelData/TemplateInsertableBuilder/buildBlock(_:)) Combines statement blocks into a single product. [`static func buildEither(first: any TemplateInsertable) -> any TemplateInsertable`](/documentation/Speech/SFCustomLanguageModelData/TemplateInsertableBuilder/buildEither(first:)) Enables support for `if-else` and `switch` constructs. [`static func buildEither(second: any TemplateInsertable) -> any TemplateInsertable`](/documentation/Speech/SFCustomLanguageModelData/TemplateInsertableBuilder/buildEither(second:)) Enables support for `if-else` and `switch` constructs. [`static func buildOptional((any TemplateInsertable)?) -> any TemplateInsertable`](/documentation/Speech/SFCustomLanguageModelData/TemplateInsertableBuilder/buildOptional(_:)) Enables support for `if` statements that do not have an `else` clause. --- 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)