code: def test_tpu_initialization(self):
      resolver = tpu_cluster_resolver.TPUClusterResolver("")
      tpu_cluster_resolver.initialize_tpu_system(resolver)
  
imports: from absl.testing import parameterized
  from tensorflow.python.compat import v2_compat
  from tensorflow.python.distribute.cluster_resolver import tpu_cluster_resolver
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the TPUInitializationTest obj's underlying member method code with example usage: obj.test_tpu_initialization() without return types