code: def test_export(self):
      v = VariableWrapper(15.0)
      root = autotrackable.AutoTrackable()
      root.v = v
  
      save_dir = os.path.join(self.get_temp_dir(), "saved_model")
      save.save(root, save_dir)
      loaded = load.load(save_dir)
      self.assertTrue(
          resource_variable_ops.is_resource_variable(loaded.v)
      )
      self.assertEqual(15, loaded.v.numpy())
  
imports: import os
  from tensorflow.python.checkpoint import checkpoint
  from tensorflow.python.eager import test
  from tensorflow.python.ops import resource_variable_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.saved_model import load
  from tensorflow.python.saved_model import save
  from tensorflow.python.trackable import autotrackable
  from tensorflow.python.trackable import base
label_desc: Use image node_id 2 for calling the VariableWrapperTest obj's underlying member method code with example usage: obj.test_export() without return types