code: def test_node_idenpotence(self):
      x = nnx.Variable(1)
      x = nnx.Variable(x)
  
      assert isinstance(x, nnx.Variable)
  
file_path: flax/flax/experimental/nnx/tests/test_containers.py
imports: import pytest
  from flax.experimental import nnx
label_desc: Use image node_id 1 for calling the TestContainers obj's underlying member method code with example usage: obj.test_node_idenpotence() without return types