code: def testMake(self):
      t = structural_tuple.structtuple(["a", "b"])
      ab = t._make((1, 2))
      self.assertEqual(1, ab.a)
      self.assertEqual(2, ab.b)
      ab = t._make((1,))
      self.assertEqual(1, ab.a)
      self.assertIs(None, ab.b)
  
imports: import tensorflow.compat.v2
  from tensorflow_probability.python.internal import nest_util
  from tensorflow_probability.python.internal import structural_tuple
  from tensorflow_probability.python.internal import test_util
  from tensorflow.python.util import nest
label_desc: Use image node_id 8 for calling the StructTupleTest obj's underlying member method code with example usage: obj.testMake() without return types