code: def _migrate_loop_structure_after_optimizer_loop_removal(
      checkpoint: _CHECKPOINT,
  ) -> _CHECKPOINT:
      """Adjusts the loop structure since it changed when the support for multiple optimizers in automatic optimization
      mode was removed. There is no longer a loop over optimizer, and hence no position to store for resuming the loop.
  
      Version: 2.0.0
      Commit: 6a56586
      PR: #16539, #16598
  
      """
      if "loops" not in checkpoint:
          return checkpoint
      if "fit_loop" not in checkpoint["loops"]:
          return checkpoint
      fit_loop = checkpoint["loops"]["fit_loop"]
  
      # optimizer_position is no longer used
      if "epoch_loop.optimizer_loop.optim_progress" in fit_loop:
          fit_loop["epoch_loop.optimizer_loop.optim_progress"].pop(
              "optimizer_position", None
          )
  
      # the subloop attribute names have changed
      if "epoch_loop.optimizer_loop.state_dict" in fit_loop:
          fit_loop[
              "epoch_loop.automatic_optimization.state_dict"
          ] = fit_loop.pop("epoch_loop.optimizer_loop.state_dict")
          fit_loop[
              "epoch_loop.automatic_optimization.optim_progress"
          ] = fit_loop.pop("epoch_loop.optimizer_loop.optim_progress")
      if "epoch_loop.manual_loop.state_dict" in fit_loop:
          fit_loop[
              "epoch_loop.manual_optimization.state_dict"
          ] = fit_loop.pop("epoch_loop.manual_loop.state_dict")
          fit_loop[
              "epoch_loop.manual_optimization.optim_step_progress"
          ] = fit_loop.pop("epoch_loop.manual_loop.optim_step_progress")
      return checkpoint
  
file_path: pytorch-lightning/src/lightning/pytorch/utilities/migration/migration.py
imports: import re
  from typing import Any, Callable, Dict, List
  from lightning.fabric.utilities.warnings import PossibleUserWarning
  from lightning.pytorch.callbacks.early_stopping import EarlyStopping
  from lightning.pytorch.callbacks.model_checkpoint import ModelCheckpoint
  from lightning.pytorch.utilities.rank_zero import rank_zero_warn
label_desc: Use image node_id 10 for calling a global function with example usage: _migrate_loop_structure_after_optimizer_loop_removal(checkpoint) and returns: checkpoint, checkpoint, checkpoint