code: def on_end(self, task) -> None:
      self.file.close()
  
file_path: ClassyVision/classy_vision/hooks/output_csv_hook.py
imports: from classy_vision.hooks import register_hook
  from classy_vision.hooks.classy_hook import ClassyHook
  from fvcore.common.file_io import PathManager
label_desc: Use image node_id 5 for calling the OutputCSVHook obj's underlying member method code with example usage: obj.on_end(task) without return types