code: func SendContainerMetric(applicationId string, instanceIndex int32, cpuPercentage float64, memoryBytes uint64, diskBytes uint64) error {
  	if metricSender == nil {
  		return nil
  	}
  
  	return metricSender.SendContainerMetric(applicationId, instanceIndex, cpuPercentage, memoryBytes, diskBytes)
  }
docs: // SendContainerMetric sends a metric that records resource usage of an app in a container.
  // The container is identified by the applicationId and the instanceIndex. The resource
  // metrics are CPU percentage, memory and disk usage in bytes. Returns an error if one occurs
  // when sending the metric.