code: def gather_metrics(
      self,
      prediction: Union[Tensor, Dict],
      target: Union[Tensor, Dict],
      extras: Dict[str, Any],
  ) -> Union[Tensor, Dict[str, Tensor]]:
      return prediction
  
imports: from typing import Any, Dict, Union
  import torch
  from torch import Tensor
  from metrics.metric_base import AverageMetric
label_desc: Use image node_id 1 for calling the DummyMetric obj's underlying member method code with example usage: obj.gather_metrics(prediction, target, extras) and returns: prediction