code: def multi_stage_total_epochs(self):
      return self._trainer_acc_epochs[-1]
  
imports: import bisect
  import functools
  import itertools
  from collections import OrderedDict
  from typing import Dict, List, Tuple
  import torch.nn
  from pytorch_lightning.loops.optimization.optimizer_loop import ClosureResult
  from reagent.core.utils import lazy_property
  from .reagent_lightning_module import ReAgentLightningModule
label_desc: Use image node_id 2 for calling the MultiStageTrainer obj's underlying member method code with example usage: obj.multi_stage_total_epochs() and returns: self