code: def test_identity_chain(self, value):
      net = sequential.Sequential([identity, identity, identity])
      self.assertIs(net(value), value)
  
file_path: sonnet/sonnet/src/sequential_test.py
imports: from absl.testing import parameterized
  from sonnet.src import sequential
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 3 for calling the SequentialTest obj's underlying member method code with example usage: obj.test_identity_chain(value) without return types