# isValidOrThrow method Null safety

void isValidOrThrow(

1. {String fromString = '',
2. Uint8List? fromByteList,
3. ValidationMode validationMode = ValidationMode.strictRFC4122}

)

## Implementation

    static void isValidOrThrow(
        {String fromString = '',
        Uint8List? fromByteList,
        ValidationMode validationMode = ValidationMode.strictRFC4122}) {
      final isValid = isValidUUID(
          fromString: fromString,
          fromByteList: fromByteList,
          validationMode: validationMode);

      if (!isValid) {
        // let's check if it is a non RFC4122 uuid and help the developer
        if (validationMode != ValidationMode.nonStrict) {
          final isValidNonStrict = isValidUUID(
              fromString: fromString,
              fromByteList: fromByteList,
              validationMode: ValidationMode.nonStrict);

          if (isValidNonStrict) {
            throw FormatException(
                'The provided UUID is not RFC4122 compliant. It seems you might be using a Microsoft GUID. Try setting `validationMode = ValidationMode.nonStrict`',
                fromString);
          }
        }

        throw FormatException('The provided UUID is invalid.', fromString);
      }
    }