code: func (c *ELB) WaitUntilAnyInstanceInService(input *DescribeInstanceHealthInput) error {
  	return c.WaitUntilAnyInstanceInServiceWithContext(aws.BackgroundContext(), input)
  }
docs: // WaitUntilAnyInstanceInService uses the Elastic Load Balancing API operation
  // DescribeInstanceHealth 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.