code: def to_metrics_format(self, x: Tensor) -> Tensor:
      return x
  
file_path: lightning-flash/src/flash/core/regression.py
imports: from typing import Callable, Mapping, Optional, Sequence, Union
  import torch.nn.functional
  import torchmetrics
  from torch import Tensor
  from flash.core.adapter import AdapterTask
  from flash.core.model import Task
label_desc: Use image node_id 2 for calling the RegressionMixin obj's underlying member method code with example usage: obj.to_metrics_format(x) and returns: x