code: def multi_validation_epoch_end(
      self, outputs, dataloader_idx: int = 0
  ):
      return self.multi_evaluation_epoch_end(
          outputs, dataloader_idx, "val"
      )
  
imports: from abc import ABC, abstractmethod
  from typing import List, Union
  import hydra
  import torch
  from omegaconf import DictConfig, OmegaConf
  from pytorch_lightning import Trainer
  from nemo.collections.asr.metrics.audio import AudioMetricWrapper
  from nemo.core.classes import ModelPT
  from nemo.utils import logging, model_utils
label_desc: Use image node_id 11 for calling the AudioToAudioModel obj's underlying member method code with example usage: obj.multi_validation_epoch_end(outputs, dataloader_idx) and returns: self