code: def _get_learning_rate(self):
      lr_schedule = getattr(self.model.optimizer, "lr", None)
      try:
          return lr_schedule(self.model.optimizer.iterations)
      except Exception:
          return None
  
label_desc: Use image node_id 2 for calling the TrackerKerasCallbackMetricsEpochEndMixin obj's underlying member method code with example usage: obj._get_learning_rate() and returns: lr_schedule, None