code: def test_set_attr_variables(self):
      state = nnx.State({"a": nnx.Param(1), "b": {"c": nnx.Param(2)}})
  
      state.a = 3
      state.b.c = 4
  
      assert isinstance(state.variables.a, nnx.Param)
      assert state.variables.a.value == 3
      assert isinstance(state.b.variables.c, nnx.Param)
      assert state.b.variables.c.value == 4
  
file_path: flax/flax/experimental/nnx/tests/test_state.py
imports: from absl.testing.absltest import TestCase
  from flax.experimental import nnx
label_desc: Use image node_id 4 for calling the StateTest obj's underlying member method code with example usage: obj.test_set_attr_variables() without return types