protected function getErrorTypeByCode($code) {
		if(!static::$errorsConstantsValues) {
			foreach(static::$errorsConstantsNames as $constantName) {
				if(defined($constantName)) {
					static::$errorsConstantsValues[constant($constantName)] = $constantName;
				}
			}
		}
		if(isset(static::$errorsConstantsValues[$code])) {
			return static::$errorsConstantsValues[$code];
		}
		return (string)$code;
	}