anchor.diff:  -export([create_table/2,
            all/0, get/1, update/1, delete/1]).
   
  --define(TBL_REMOTE_CLUSTER_CONF, 'leo_remote_cluster_conf').
  +-define(TBL_CLUSTER_CONF, 'leo_cluster_conf').
   -define(ERROR_MNESIA_NOT_START, '').
   
   
  
positive.code: -spec(delete(string()) ->
               ok | {error, any()}).
  delete(ClusterId) ->
      Tbl = ?TBL_REMOTE_CLUSTER_CONF,
  
      case ?MODULE:get(ClusterId) of
          {ok, SystemConf} ->
  
negative.code: -spec(get(string()) ->
               {ok, #system_conf{}} | not_found | {error, any()}).
  get(ClusterId) ->
      Tbl = ?TBL_CLUSTER_CONF,
  
      case catch mnesia:table_info(Tbl, all) of
          {'EXIT', _Cause} ->
  