code: def test_override(self, backend_mode):
      with io.override_mode(backend_mode):
          self.assertEqual(io.io_mode, backend_mode)
  
imports: import os
  import tempfile
  import jax
  import tensorflow
  from absl.testing import absltest, parameterized
  from flax import errors, io
label_desc: Use image node_id 1 for calling the IOTest obj's underlying member method code with example usage: obj.test_override(backend_mode) without return types