** Enhancements requests **
In Spring mvc, RequestBodyAdvice and ResponseBodyAdvice are provided to access and manipulate java objects of message bodies before serialization of incoming requests/after deserialization of outgoing responses.
While they are useful for implementing common logic requiring body data such as logging or customization, RestClient does not have any equivalent feature to do so.
ClientHttpRequestInterceptor is a bit similar but it allows access to only byte array representation of body data.
