code: def testFlattenWithZeroDim(self):
      inputs = tf.ones([1, 0])
      output = reshape.Flatten()(inputs)
      self.assertEqual(output.shape, [1, 0])
  
imports: from absl.testing import parameterized
  import numpy
  from sonnet.src import reshape
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 6 for calling the FlattenTest obj's underlying member method code with example usage: obj.testFlattenWithZeroDim() without return types