code: def test_default(self):
      self.assertFalse(self._flag.value)
      self.assertFalse(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 3 for calling the MyTestCase obj's underlying member method code with example usage: obj.test_default() without return types