code: def testNestFlatten(self):
      a = object_identity._ObjectIdentityWrapper("a")
      b = object_identity._ObjectIdentityWrapper("b")
      c = object_identity._ObjectIdentityWrapper("c")
      flat = nest.flatten([[[(a, b)]], c])
      self.assertEqual(flat, [a, b, c])
  
file_path: tensorflow/tensorflow/python/util/object_identity_test.py
imports: from tensorflow.python.platform import test
  from tensorflow.python.util import nest
  from tensorflow.python.util import object_identity
label_desc: Use image node_id 2 for calling the ObjectIdentityWrapperTest obj's underlying member method code with example usage: obj.testNestFlatten() without return types