docstr: Setup loss for this model.
          
docstr_tok: ["Setup","loss","for","this","model","."]
code: def _setup_loss(self):
      """Setup loss for this model."""
      self.loss = AudioToAudioModel.from_config_dict(self._cfg.loss)
  
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 2 for calling the AudioToAudioModel obj's underlying member method code with example usage: obj._setup_loss() without return types