I am using OAuth and I need to put the OAuth token and API version in my header every time I make a request. I see the @Header annotation, but is there a way to make them dynamic?

Here is the concept...

@Headers({Authorization:'OAuth {var}', X-Api-Version={var} })

Can you pass them in at Runtime?

@GET("/users")
void getUsers(
    @Header("Authorization") String auth, 
    @Header("X-Api-Version") String version, 
    Callback<User> callback
)

I think this could be added to the documentation on the website. I would be happy to add it after I understand the correct implementation. Thanks!