code: func (c *ELBV2) WaitUntilTargetInService(input *DescribeTargetHealthInput) error {
  	return c.WaitUntilTargetInServiceWithContext(aws.BackgroundContext(), input)
  }
docs: // WaitUntilTargetInService uses the Elastic Load Balancing v2 API operation
  // DescribeTargetHealth to wait for a condition to be met before returning.
  // If the condition is not met within the max attempt window, an error will
  // be returned.