anchor.diff:      cb_return().
   
   % Config and Misc
  -
  --callback init_delay() -> non_neg_integer().
   
   -callback trigger_interval() -> pos_integer().
   
  
positive.code:     {select_reply_data, 5},
      {integrate_data, 4},
      {handle_msg, 2},
      {init_delay, 0},
      {trigger_interval, 0},
      {min_cycles_per_round, 0},
      {max_cycles_per_round, 0},
  
negative.code: -type round() :: non_neg_integer().
  -type round_status() :: 'current_round' | 'old_round'.
  -type notify_keyword() :: new_round | leader | exch_failure.
  
  % Startup
  
  