anchor.diff:  %% API Function Definitions
   %% ------------------------------------------------------------------
   
  -start_link() ->
  -    gen_server:start_link({local, ?SERVER}, ?MODULE, [], []).
  +start_link(Args) ->
  +    gen_server:start_link({local, ?SERVER}, ?MODULE, Args, []).
   
   -spec change_tasks_file(File :: string()) -> {ok, changed} | {ok, no_change_needed} | {error, any()}.
   change_tasks_file(File) ->
  
positive.code: %% ------------------------------------------------------------------
  
  -export([
      start_link/0,
      change_tasks_file/1,
      change_ring/1,
      prepare/0
  
negative.code:     gen_server:call(?MODULE, {change_ring, Ring}).
  
  prepare() ->
      gen_server:call(?MODULE, prepare, infinity).
  
  %% ------------------------------------------------------------------
  %% gen_server Function Definitions
  