docstr: Initializes the model optimizer
docstr_tok: ["Initializes","the","model","optimizer"]
code: def init_optimizers(self):
      "Initializes the model optimizer"
      self.optimizer = self.hparams.opt_class(
          self.hparams.model.parameters()
      )
  
      if self.checkpointer is not None:
          self.checkpointer.add_recoverable("optimizer", self.optimizer)
  
file_path: speechbrain/recipes/MultiWOZ/response_generation/llama2/train_with_llama2.py
imports: import sys
  import speechbrain
  import torch
  from itertools import chain
  from hyperpyyaml import load_hyperpyyaml
  from speechbrain.utils.distributed import run_on_main
  import math
  from speechbrain.dataio.batch import PaddedBatch
label_desc: Use image node_id 6 for calling the ResGenBrain obj's underlying member method code with example usage: obj.init_optimizers() without return types