code: def aggregate_metrics(self):
      # Network metrics don't need to be averaged.
      return dict(self._metrics)
  
imports: import psutil
  from mlflow.system_metrics.metrics.base_metrics_monitor import BaseMetricsMonitor
label_desc: Use image node_id 4 for calling the NetworkMonitor obj's underlying member method code with example usage: obj.aggregate_metrics() and returns: dict