code: def test_split_merge(self):
      m = nnx.Dict(a=nnx.Param(1))
  
      @jax.jit
      def g(state: nnx.State, graphdef: nnx.GraphDef[nnx.Dict[int]]):
          m = graphdef.merge(state)
          m.a = 2
          return m.split()
  
      state, graphdef = g(*m.split())
      m2 = graphdef.merge(state)
  
      assert m2.a == 2
  
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 5 for calling the TestModule obj's underlying member method code with example usage: obj.test_split_merge() and returns: m