class_docstr: Tests for non-member functions in the module xla_sharding.py.
code: def test_get_sharding_tile_shape_returns_none_on_none_input(self):
      self.assertIsNone(xla_sharding.get_sharding_tile_shape(None))
  
imports: from absl.testing import absltest
  import numpy
  from google.protobuf.message import DecodeError
  from local_xla.xla import xla_data_pb2
  from tensorflow.python.compiler.xla.experimental import xla_sharding
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
label_desc: Use image node_id 6 for calling the XlaShardingTest obj's underlying member method code with example usage: obj.test_get_sharding_tile_shape_returns_none_on_none_input() without return types