public static function remove($key) {

		if(false === is_string($key)) {
			return trigger_error(sprintf('Argument 1 passed to %s() must be of the type string, "%s" given', __METHOD__, gettype($key)), E_USER_ERROR);
		}

		if($key && isset(static :: $data[$key])) {
			unset(static :: $data[$key]);
		}
	}