anchor.diff:      chttpd:start_delayed_json_response(Req, 200, [], "{\"docs\":[").
   
   
  -end_find_resp(Resp0, KVs) ->
  +end_find_resp(Acc) ->
  +    #vacc{resp=Resp0, kvs=KVs} = Acc,
       FinalAcc = lists:foldl(fun({K, V}, Acc) ->
           JK = ?JSON_ENCODE(K),
           JV = ?JSON_ENCODE(V),
  
positive.code:     {ok, Opts0} = mango_opts:validate_find(chttpd:json_body_obj(Req)),
      {value, {selector, Sel}, Opts} = lists:keytake(selector, 1, Opts0),
      {ok, Resp0} = start_find_resp(Req),
      {ok, {Resp1, _, KVs}} = run_find(Resp0, Db, Sel, Opts),
      end_find_resp(Resp1, KVs);
  
  handle_find_req(Req, _Db) ->
      chttpd:send_method_not_allowed(Req, "POST").
  
negative.code: -include("mango.hrl").
  -include("mango_idx.hrl").
  
  -record(vacc, {
      resp,
      prepend,
      kvs
  }).
  
  handle_req(#httpd{} = Req, Db0) ->
      try
  