code: func (c *ELBV2) WaitUntilLoadBalancerExists(input *DescribeLoadBalancersInput) error {
  	return c.WaitUntilLoadBalancerExistsWithContext(aws.BackgroundContext(), input)
  }
docs: // WaitUntilLoadBalancerExists uses the Elastic Load Balancing v2 API operation
  // DescribeLoadBalancers 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.