code: def before_epoch(self):
      for metric in self.metrics:
          metric.reset()
  
file_path: aim/aim/sdk/adapters/fastai.py
imports: from logging import getLogger
  from typing import Optional
  from aim.sdk.run import Run
  from aim.ext.resource.configs import DEFAULT_SYSTEM_TRACKING_INT
label_desc: Use image node_id 6 for calling the AimCallback obj's underlying member method code with example usage: obj.before_epoch() without return types