code: func (s *Scheduler) stack(stackName *string) (*cloudformation.Stack, error) {
  	resp, err := s.cloudformation.DescribeStacks(&cloudformation.DescribeStacksInput{
  		StackName: stackName,
  	})
  	if err != nil {
  		return nil, err
  	}
  	return resp.Stacks[0], nil
  }
docs: // stack returns the cloudformation.Stack for the given stack name.