code: def experiment(self) -> Run:
      if not self._run:
          self.setup()
      return self._run
  
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 2 for calling the AimCallback obj's underlying member method code with example usage: obj.experiment() and returns: self