> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 0.30.0 **`(feat):`** Add support for nil-safe getter methods. Callers can more easily access nested properties by chaining together getter method calls instead of a long series of `!= nil` checks. ## 0.29.0 **`(feat):`** All SDKs now include an exported `FileParam` type that can be used to configure the `Content-Type` of file upload properties. **`(fix):`** Resolves an issue where multipart/form-data lists were incorrectly serialized as JSON. They are now added as individual parts. **`(internal):`** Refactor file upload endpoint generation with the new `core.MultipartWriter`. This significantly improves the aesthetics of the generated code.