anchor.diff:          case FBDest of
               undefined ->
                   0;
  -            _ when FbReqKVV =:= [] ->
  +            _ when not SendReqKeyReply ->
                   send_request_resolve(FBDest, {?key_upd, FbKVV, []},
                                        Stats#resolve_stats.session_id,
                                        FromMyNode, undefined, [], true);
  
positive.code:     % allow the garbage collection to clean up the ReqKeys here:
      % also update the KvvList
      State#rr_resolve_state{operation = {?key_upd, MyIOtherKvvList, []},
                             other_kv_tree = MyIOtherKvTree};
  
  on({get_entries_response, EntryList}, State =
         #rr_resolve_state{ operation = {?key_upd, MyIOtherKvvList, []},
  
negative.code:          my_range       = undefined                               :: undefined | intervals:interval(),
           fb_dest_pid    = undefined                               :: undefined | comm:mypid(),
           fb_send_kvv    = []                                      :: OutdatedOnOther::kvv_list(),
           fb_had_kvv_req = false                                   :: NonEmptyReqList::boolean(),
           fb_send_kvv_req= []                                      :: RequestedByOther::kvv_list(),
           other_kv_tree  = gb_trees:empty()                        :: MyIOtherKvTree::gb_tree(),
           send_stats     = undefined                               :: undefined | comm:mypid(),
  