anchor.diff:  
   
   %% @doc Tries to create a session.
  -%% if there is an Error 500 retries until ?CREATE_SESSION_RETRY
  +%% if there is an Error 500 retries until ?CREATE_SESSION_RETRIES
   
   -spec maybe_create_session(string(), pos_integer()) -> {ok,string()} | {error, string()}.
   maybe_create_session(Who, N) when N > 0 ->
  
positive.code: %% @end.
  -spec lock(string()) -> ok | {error, string()}.
  lock(Who) ->
      case maybe_create_session(Who, ?CREATE_SESSION_RETRY) of
          {ok, SessionId} ->
              start_session_ttl_updater(SessionId),
              Now = time_compat:erlang_system_time(seconds),
  
negative.code: 
  -include("autocluster.hrl").
  
  -define(CREATE_SESSION_RETRIES, 10).
  
  
  %%--------------------------------------------------------------------
  