anchor.diff:  %% @end
   %%--------------------------------------------------------------------
   
  --spec fetch_from_cache(Seqs :: ordsets:ordset()) -> no_return().
  +-spec fetch_from_cache(Seqs :: ordsets:ordset(seq())) -> no_return().
   fetch_from_cache(Seqs) ->
       {Hits, Misses} = changes_cache:query(Seqs),
       lists:foreach(fun({Seq, {Doc, Type}}) ->
  
positive.code: %% Sends to all providers information to skip the sequence numbers.
  %% @end
  %%--------------------------------------------------------------------
  -spec ignore_all(Seqs :: ordsets:ordset()) -> no_return().
  ignore_all(Seqs) ->
      Subscriptions = subscriptions:all(),
      lists:foreach(fun(#document{value = Subscription}) ->
  
negative.code: %% @end
  %%--------------------------------------------------------------------
  
  -spec fetch_from_db(Seqs :: ordsets:ordset(seq())) -> no_return().
  fetch_from_db([]) -> ok;
  fetch_from_db(Seqs) ->
      From = hd(Seqs) - 1,
  