anchor.diff:      disc_driver_ctx => ?DISC_CTX,
       remote_driver => ?REMOTE_DRV
   }).
  +-define(CTX(Key), datastore_multiplier:extend_name(?KEY, ?CTX)).
   
   %%%===================================================================
   %%% Test functions
  
positive.code:     ]).
  
  -define(MODEL, ets_cached_model).
  -define(MEM_CTX, ?MEM_CTX(?MODEL)).
  -define(CTX, #{
      model => ?MODEL,
      mutator_pid => self(),
  
negative.code: add_link_should_save_link_on_disc(Config) ->
      [Worker | _] = ?config(cluster_worker_nodes, Config),
      {{ok, Link}, _} = ?assertMatch({{ok, #link{}}, _}, rpc:call(Worker,
          datastore_links_crud, apply, [?CTX(?KEY), ?KEY, ?LINK_TREE_ID, add, [
              ?LINK_NAME, ?LINK_TARGET
          ]]
      )),
  