anchor.diff:  -include_lib("ctool/include/logging.hrl").
   
   %% API
  --export([save_links_maps/4, delete_links/3, delete_links_from_maps/4, fetch_link/4, foreach_link/5,
  -    links_doc_key/1]).
  --export([create_link_in_map/4, save_links_maps/4, delete_links/3, delete_links_from_maps/4, fetch_link/4, foreach_link/5]).
  +-export([create_link_in_map/4, save_links_maps/4, delete_links/3, delete_links_from_maps/4,
  +    fetch_link/4, foreach_link/5, links_doc_key/1]).
   
   %%%===================================================================
   %%% API
  
positive.code: 
  %%--------------------------------------------------------------------
  %% @doc
  %% Saves link maps into several documents.
  %% @end
  %%--------------------------------------------------------------------
  -spec save_links_maps(Driver :: atom(), model_behaviour:model_config(), datastore:ext_key(),
  
negative.code: 
  %%--------------------------------------------------------------------
  %% @doc
  %% Creates link. Before creation it checks if it exists in several documents.
  %% @end
  %%--------------------------------------------------------------------
  