code: def close(self):
      if self._run:
          self._run.close()
          del self._run
          self._run = None
  
file_path: aim/aim/sdk/adapters/xgboost.py
imports: from typing import Optional
  from aim.ext.resource.configs import DEFAULT_SYSTEM_TRACKING_INT
  from aim.sdk.run import Run
label_desc: Use image node_id 7 for calling the AimCallback obj's underlying member method code with example usage: obj.close() without return types