code: func (c *ECS) ListAttributes(input *ListAttributesInput) (*ListAttributesOutput, error) {
  	req, out := c.ListAttributesRequest(input)
  	return out, req.Send()
  }
docs: // ListAttributes API operation for Amazon EC2 Container Service.
  //
  // Lists the attributes for Amazon ECS resources within a specified target type
  // and cluster. When you specify a target type and cluster, ListAttributes returns
  // a list of attribute objects, one for each attribute on each resource. You
  // can filter the list of results to a single attribute name to only return
  // results that have that name. You can also filter the results by attribute
  // name and value, for example, to see which container instances in a cluster
  // are running a Linux AMI (ecs.os-type=linux).
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for Amazon EC2 Container Service's
  // API operation ListAttributes for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeClusterNotFoundException "ClusterNotFoundException"
  //   The specified cluster could not be found. You can view your available clusters
  //   with ListClusters. Amazon ECS clusters are Region-specific.
  //
  //   * ErrCodeInvalidParameterException "InvalidParameterException"
  //   The specified parameter is invalid. Review the available parameters for the
  //   API request.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/ecs-2014-11-13/ListAttributes