code: def state_dict(self) -> Dict[str, Any]:
      return {"tensor": self.tensor}
  
imports: import io
  import os
  import unittest
  from typing import Any, Dict, List
  import torch
  import torch.distributed
  from torch.autograd import Variable
  from torch.distributed._shard import sharded_tensor, sharding_spec
  from torchrec.optim.keyed import CombinedOptimizer, KeyedOptimizer, KeyedOptimizerWrapper, OptimizerWrapper
  from torchrec.test_utils import get_free_port
label_desc: Use image node_id 2 for calling the DummyOptimizerModule obj's underlying member method code with example usage: obj.state_dict() and returns: dict