anchor.diff:  
   -define(SERVER, ?MODULE).
   
  --record(state, {session, connected, ets_prep, uuid_generator, log_pid}).
  +-record(state, {session, connected, uuid_generator, log_pid}).
   
   -spec(set_cluster_options(OptionList :: list()) ->
       ok | badarg | {error, Reason :: binary()}).
  
positive.code: 
  handle_call({prepare_statement, Identifier, Query}, From, State) ->
  
      AlreadyExist = prepare_statement_exist(State#state.ets_prep, Identifier),
  
      if
          AlreadyExist ->
  
negative.code: init([]) ->
      process_flag(trap_exit, true),
  
      ?PREPARED_ETS_TABLE = ets:new(?PREPARED_ETS_TABLE, [set, named_table, protected, {read_concurrency, true}]),
  
      LogLevel = case application:get_env(erlcass, log_level) of
          {ok, Level} ->
  