code: def test_for_two_vars_ds_iterator(self, l):
      inputs_ = lambda: (iter(_int_dataset(l)), tf.Variable(0))
      self.assertFunctionMatchesEagerStatefulInput(
          for_two_vars, inputs_
      )
  
imports: import functools
  import itertools
  from absl.testing import parameterized
  import tensorflow
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 9 for calling the ReferenceTest obj's underlying member method code with example usage: obj.test_for_two_vars_ds_iterator(l) without return types