code: def log(self, **kwargs) -> None:
      self._reporter_observable.notify_observers(**kwargs)
  
file_path: ReAgent/reagent/reporting/reporter_base.py
imports: import abc
  import logging
  from typing import Dict
  import torch
  from reagent.core.observers import CompositeObserver, EpochEndObserver, IntervalAggregatingObserver, ValueListObserver
  from reagent.core.result_registries import TrainingReport
  from reagent.core.tracker import ObservableMixin
  from reagent.core.utils import lazy_property
label_desc: Use image node_id 2 for calling the ReporterBase obj's underlying member method code with example usage: obj.log() without return types