#define HTTP_BEGIN_ARGS(method, ret_ref, req_args) HTTP_BEGIN_ARGS_EX(HttpMessage, method, ret_ref, req_args)
#define HTTP_EMPTY_ARGS(method, ret_ref) HTTP_EMPTY_ARGS_EX(HttpMessage, method, ret_ref)
#define HTTP_BEGIN_ARGS(method, ret_ref, req_args) HTTP_BEGIN_ARGS_EX(HttpMessage, method, ret_ref, req_args)
#define HTTP_EMPTY_ARGS(method, ret_ref) HTTP_EMPTY_ARGS_EX(HttpMessage, method, ret_ref)