class_docstr: Base class of system metrics monitor.
code: def metrics(self):
      return self._metrics
  
file_path: mlflow/mlflow/system_metrics/metrics/base_metrics_monitor.py
imports: import abc
  from collections import defaultdict
label_desc: Use image node_id 4 for calling the BaseMetricsMonitor obj's underlying member method code with example usage: obj.metrics() and returns: self