anchor.diff:  
   -export([
     collect_change/1,
  +  include_doc/1,
     collect_changes/1,
     changes_feed_callback/1,
     heartbeat_collect_change/1
  
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: all() ->
    [
      collect_change,
      include_doc,
      collect_changes,
      changes_feed_callback,
      heartbeat_collect_change
  