code: def replace_mul_with_div_pass(gm) -> PassResult:
      modified = False
      for node in gm.graph.nodes:
          if node.op == "call_function" and node.target == torch.mul:
              node.target = torch.div
              modified = True
      return PassResult(gm, modified)
  
imports: import torch
  import torch.fx
  from torch.fx.passes.infra.pass_base import PassBase, PassResult
  from torch.fx.passes.infra.pass_manager import _topological_sort_passes, pass_result_wrapper, PassManager, this_before_that_pass_constraint
  from torch.testing._internal.common_utils import TestCase
label_desc: Use image node_id 1 for calling a global function with example usage: replace_mul_with_div_pass(gm) and returns: PassResult