anchor.diff:    include_doc/1,
     collect_changes/1,
     changes_feed_callback/1,
  -  heartbeat_collect_change/1
  +  heartbeat_collect_change/1,
  +  multiple_put/1
   ]).
   
   -export([
  
positive.code:     include_doc,
      collect_changes,
      changes_feed_callback,
      heartbeat_collect_change
    ].
  
  init_per_suite(Config) ->
  
negative.code:     #{ <<"seq">> := 3, <<"id">> := <<"cc">>},
      #{ <<"seq">> := 4, <<"id">> := <<"dd">>}
    ] = barrel_httpc_changes:changes(Pid),
    ok = barrel_httpc_changes:stop(Pid).
  
  changes_feed_callback(Config) ->
    Self = self(),
  