code: def on_validation_epoch_end(self) -> None:
      print("Validation Epoch:", self.current_epoch)
      avg_loss = torch.stack(self.loss).mean()
      self.log("val_loss", avg_loss)
      self.loss.clear()
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from torch.utils.data import DataLoader
  from torchmetrics import Accuracy
  from ray import train
  from ray.train.lightning._lightning_utils import import_lightning
label_desc: Use image node_id 5 for calling the DoubleLinearModule obj's underlying member method code with example usage: obj.on_validation_epoch_end() without return types