docstr: Initializes the wav2vec2 optimizer and model optimizer
docstr_tok: ["Initializes","the","wav2vec2","optimizer","and","model","optimizer"]
code: def init_optimizers(self):
      """Initializes the wav2vec2 optimizer and model optimizer"""
  
      # Join optimizers.
      self.optimizer_wav2vec = self.hparams.opt_class_wav2vec(
          self.hparams.model_wav2vec2.parameters()
      )
      self.optimizer = self.hparams.opt_class(
          self.hparams.model.parameters()
      )
  
      # Add opitmizers to checkpoint recoverables.
      if self.checkpointer is not None:
          self.checkpointer.add_recoverable(
              "optimizer_wav2vec", self.optimizer_wav2vec
          )
          self.checkpointer.add_recoverable("optimizer", self.optimizer)
  
      self.optimizers_dict = {
          "wav2vec_optimizer": self.optimizer_wav2vec,
          "model_optimizer": self.optimizer,
      }
  
file_path: speechbrain/recipes/MEDIA/SLU/CTC/train_hf_wav2vec.py
imports: import sys
  import torch
  import logging
  import speechbrain
  from hyperpyyaml import load_hyperpyyaml
  from speechbrain.dataio.batch import PaddedBatch
  from speechbrain.utils.distributed import run_on_main
  from media_prepare import prepare_media
label_desc: Use image node_id 3 for calling the SLU obj's underlying member method code with example usage: obj.init_optimizers() without return types