code: def testVersionValidity(self):
      self.assertValidVersion(jax.__version__)
      self.assertValidVersion(jax._src.lib.version_str)
  
imports: import contextlib
  import datetime
  import unittest
  from unittest import mock
  import re
  from absl.testing import absltest
  import jax
  from jax._src.lib import check_jaxlib_version
  from jax._src import test_util
label_desc: Use image node_id 2 for calling the JaxVersionTest obj's underlying member method code with example usage: obj.testVersionValidity() without return types