code: def test_no_output(self):
      m = batch_apply.BatchApply(NoOutputModule())
      y = m(tf.ones([1, 1, 1]))
      self.assertIsNone(y)
  
imports: from absl.testing import parameterized
  import numpy
  from sonnet.src import base
  from sonnet.src import batch_apply
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 2 for calling the BatchApplyTest obj's underlying member method code with example usage: obj.test_no_output() without return types