untagResource method
Removes the specified tags from the specified AWS RoboMaker resource.
To remove a tag, specify the tag key. To change the tag value of an
existing tag key, use 
TagResource .
May throw InternalServerException. May throw ResourceNotFoundException. May throw InvalidParameterException. May throw ThrottlingException.
Parameter resourceArn :
The Amazon Resource Name (ARN) of the AWS RoboMaker resource you are
removing tags.
Parameter tagKeys :
A map that contains tag keys and tag values that will be unattached from
the resource.
Implementation
Future<void> untagResource({
  required String resourceArn,
  required List<String> tagKeys,
}) async {
  ArgumentError.checkNotNull(resourceArn, 'resourceArn');
  _s.validateStringLength(
    'resourceArn',
    resourceArn,
    1,
    1224,
    isRequired: true,
  );
  ArgumentError.checkNotNull(tagKeys, 'tagKeys');
  final $query = <String, List<String>>{
    'tagKeys': tagKeys,
  };
  final response = await _protocol.send(
    payload: null,
    method: 'DELETE',
    requestUri: '/tags/${Uri.encodeComponent(resourceArn)}',
    queryParams: $query,
    exceptionFnMap: _exceptionFns,
  );
}