code: def __init__(self):
      self._foo = None
      self._built = False
  
file_path: sonnet/sonnet/src/distribute/distributed_batch_norm_test.py
imports: from absl import logging
  from absl.testing import parameterized
  from sonnet.src import test_utils
  from sonnet.src.distribute import distributed_batch_norm
  from sonnet.src.distribute import replicator
  import tensorflow
label_desc: Use image node_id 1 to create a new TestMetric object  with example: obj = TestMetric()