code: func (engine *DockerStatsEngine) GetTaskHealthMetrics() (*ecstcs.HealthMetadata, []*ecstcs.TaskHealth, error) {
  	var taskHealths []*ecstcs.TaskHealth
  	metadata := &ecstcs.HealthMetadata{
  		Cluster:           aws.String(engine.cluster),
  		ContainerInstance: aws.String(engine.containerInstanceArn),
  		MessageId:         aws.String(uuid.NewRandom().String()),
  	}
  
  	if !engine.containerHealthsToMonitor() {
  		return metadata, taskHealths, nil
  	}
  
  	engine.lock.RLock()
  	defer engine.lock.RUnlock()
  
  	for taskARN := range engine.tasksToHealthCheckContainers {
  		taskHealth := engine.getTaskHealthUnsafe(taskARN)
  		if taskHealth == nil {
  			continue
  		}
  		taskHealths = append(taskHealths, taskHealth)
  	}
  
  	if len(taskHealths) == 0 {
  		return nil, nil, EmptyHealthMetricsError
  	}
  
  	return metadata, taskHealths, nil
  }
docs: // GetTaskHealthMetrics returns the container health metrics