code: def test_has_module_state(self):
      class Foo(nnx.Module):
          ...
  
      foo = Foo()
  
      assert hasattr(foo, "_module__state")
  
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 1 for calling the TestModule obj's underlying member method code with example usage: obj.test_has_module_state() without return types