code: def tearDownModule():
      if prev_xla_flags is None:
          del os.environ["XLA_FLAGS"]
      else:
          os.environ["XLA_FLAGS"] = prev_xla_flags
      xla_bridge.get_backend.cache_clear()
  
imports: import math
  import os
  from absl.testing import absltest
  import numpy
  import jax
  from jax.sharding import NamedSharding, PartitionSpec
  from jax._src import config
  from jax._src import layout
  from jax._src import test_util
  from jax._src.util import safe_zip
  from jax._src import xla_bridge
  from jax._src.lib import xla_extension_version
label_desc: Use image node_id 2 for calling a global function with example usage: tearDownModule() without return types