code: def test_update_moduledef(self):
      class Foo(nnx.Module):
          def add_field(self):
              self.a = 1
  
      m1 = Foo()
      m2 = Foo()
      m2.add_field()
  
      m1.update(m2.get_graphdef())
  
      assert m1.a == 1
  
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 21 for calling the TestModule obj's underlying member method code with example usage: obj.test_update_moduledef() without return types