code: func (task *Task) GetID() (string, error) {
  	// Parse taskARN
  	parsedARN, err := arn.Parse(task.Arn)
  	if err != nil {
  		return "", errors.Wrapf(err, "task get-id: malformed taskARN: %s", task.Arn)
  	}
  
  	// Get task resource section
  	resource := parsedARN.Resource
  
  	if !strings.Contains(resource, arnResourceDelimiter) {
  		return "", errors.Errorf("task get-id: malformed task resource: %s", resource)
  	}
  
  	resourceSplit := strings.SplitN(resource, arnResourceDelimiter, arnResourceSections)
  	if len(resourceSplit) != arnResourceSections {
  		return "", errors.Errorf(
  			"task get-id: invalid task resource split: %s, expected=%d, actual=%d",
  			resource, arnResourceSections, len(resourceSplit))
  	}
  
  	return resourceSplit[1], nil
  }
docs: // GetID is used to retrieve the taskID from taskARN
  // Reference: http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html#arn-syntax-ecs