code: def test_shared_module(self):
      m1 = nnx.Dict(a=nnx.Param(1), b=nnx.Param(2))
      m2 = nnx.Dict(x=m1, y=m1, z=nnx.Param(3))
  
      m3 = nnx.merge(m2.split())
  
      assert m3["x"] is m3["y"]
      assert m3["x"]["a"] is m3["y"]["a"]
      assert m3["x"]["b"] is m3["y"]["b"]
  
imports: import dataclasses
  from copy import deepcopy
  from typing import Any, TypeVar
  import jax
  import jax.numpy
  import pytest
  from flax.experimental import nnx
label_desc: Use image node_id 9 for calling the TestModule obj's underlying member method code with example usage: obj.test_shared_module() without return types