code: func (c *RDS) WaitUntilDBInstanceAvailable(input *DescribeDBInstancesInput) error {
  	return c.WaitUntilDBInstanceAvailableWithContext(aws.BackgroundContext(), input)
  }
docs: // WaitUntilDBInstanceAvailable uses the Amazon RDS API operation
  // DescribeDBInstances 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.