code: def test_while_two_vars(self, n, type_):
      n = type_(n)
      self.assertFunctionMatchesEager(while_two_vars, n)
  
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 7 for calling the ReferenceTest obj's underlying member method code with example usage: obj.test_while_two_vars(n, type_) without return types