anchor.diff:  is_quiet(?RDELETEQ)   -> true;
   is_quiet(?RINCRQ)     -> true;
   is_quiet(?RDECRQ)     -> true;
  +is_quiet(?TAP_CONNECT) -> true;
   is_quiet(_)           -> false.
   
   ext(?SET,        Entry) -> ext_flag_expire(Entry);
  
positive.code:         Response -> process_error_response(Response)
      end.
  
  
  %% -------------------------------------------------
  
  
negative.code:          set_flush_param/3,
           set_vbucket/3,
           stats/1,
           stats/4,
           tap_connect/2]).
  
  -type recv_callback() :: fun((_, _, _) -> any()) | undefined.
  -type mc_timeout() :: undefined | infinity | non_neg_integer().
  