how to get AnResponse<User.class> in rx java

I need to access the HTTP status code and headers with response model in RXJava approach.
so after review library, find ANResponse but how to getSingleObjet for ANResponse<User.class>?

For additional information:
 in status code 201 I should handle status code in subscribing method RXJava
or
I need get custom header field from the server at subscribing method RXJava