question: private static ServiceTicketResponse checkGetNfcServiceTicketResponse ( ServiceTicketResponse serviceTicketResponse ) throws RpcException { logger . info ( "Checking {}" , serviceTicketResponse ) ; switch ( serviceTicketResponse . getResult ( ) ) { case OK : break ; case SYSTEM_ERROR : throw new SystemErrorException ( serviceTicketResponse . getError ( ) ) ; case NOT_FOUND : throw new DatastoreNotFoundException ( serviceTicketResponse . getError ( ) ) ; default : throw new RpcException ( String . format ( "Unknown result: %s" , serviceTicketResponse . getError ( ) ) ) ; } return serviceTicketResponse ; }
target:  This method validates a ServiceTicketResponse object, raising an exception if the response reflects an operation failure.