code: def test_trace_level_error_on_nnx_grad(self):
      # error occurs because nnx updates its nnx_trace
      # in nnx.grad.
      m = nnx.Dict(a=nnx.Param(1.0))
  
      @nnx.grad
      def f(_):
          with pytest.raises(
              nnx.TraceContextError,
              match="Cannot mutate Module from different trace level",
          ):
              m.a = 2.0
          return 1.0
  
      f(m)
  
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 7 for calling the TestModule obj's underlying member method code with example usage: obj.test_trace_level_error_on_nnx_grad() and returns: int