anchor.diff:    ] = barrel_httpc_changes:changes(Pid),
     
     ok = barrel_httpc_changes:stop(Pid).
  +
  +
   
   changes_feed_callback(Config) ->
     Self = self(),
  
positive.code:   [] = barrel_httpc_changes:changes(Pid),
    ok = barrel_httpc_changes:stop(Pid).
  
  collect_changes(Config) ->
    {ok, Pid} = barrel_httpc_changes:start_link(db(Config), #{since => 0, mode => sse}),
    [] = barrel_httpc_changes:changes(Pid),
  
negative.code: 
  -export([
    collect_change/1,
    include_doc/1,
    collect_changes/1,
    changes_feed_callback/1,
    heartbeat_collect_change/1
  