code: def assertValidVersion(self, version):
      self.assertIsNotNone(VERSION_PATTERN.match(version))
  
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 1 for calling the JaxVersionTest obj's underlying member method code with example usage: obj.assertValidVersion(version) without return types