code: def _update(self, output: Tuple[torch.Tensor, torch.Tensor]) -> None:
      pass
  
file_path: ignite/ignite/contrib/metrics/regression/_base.py
imports: from abc import abstractmethod
  from typing import Tuple
  import torch
  from ignite.metrics import Metric
  from ignite.metrics.metric import reinit__is_reduced
label_desc: Use image node_id 2 for calling the _BaseRegression obj's underlying member method code with example usage: obj._update(output) without return types