Kotlin: unwrap an object using Jackson in Spring I'm looking at trying to unwrap a Kotlin object to the top level of the JSON structure when it is unwrapped, but my app just seems to ignore the @Unwrapped annotation. Here is my object: data class MyResponse( @JsonUnwrapped val myObject: MyObject? = null, val secondObject: String? = null ) data class MyObject( val fieldA: String ) The controller: @RestController @RequestMapping(produces = [MediaType.APPLICATION_JSON_VALUE]) class MyController() {...