code: def test_opt_opt_refinement(self):
      @torch.jit.script
      def test_unify(weight, bias):
          # type: (Optional[int], Optional[int]) -> Optional[int]
          if weight is not None:
              opt = None
          else:
              if bias is not None:
                  opt = 1
              else:
                  opt = None
  
          return opt
  
imports: import os
  import sys
  import torch
  from torch.testing._internal.jit_utils import JitTestCase, make_global
  from torch.testing._internal.common_utils import IS_WINDOWS
  from collections import namedtuple
  from typing import List, Tuple, Dict, NamedTuple
label_desc: Use image node_id 32 for calling the TestTyping obj's underlying member method code with example usage: obj.test_opt_opt_refinement() and returns: opt