class_docstr: Base class for the reference tests.
code: def test_possible_return_before_loop(self, c1, c2, n):
      self.assertFunctionMatchesEager(
          possible_return_before_loop, c1, c2, n
      )
  
imports: import itertools
  from absl.testing import parameterized
  import tensorflow
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 6 for calling the ReferenceTest obj's underlying member method code with example usage: obj.test_possible_return_before_loop(c1, c2, n) without return types