code: def test_untyped_update(self):
      config.update(self._flag.name, True)
      self.assertTrue(self._flag.value)
      self.assertTrue(config.test)
  
file_path: flax/tests/configurations_test.py
imports: from unittest import mock
  from absl.testing import absltest
  from flax.configurations import bool_flag, config
label_desc: Use image node_id 5 for calling the MyTestCase obj's underlying member method code with example usage: obj.test_untyped_update() without return types