code: def test(self):
      # Check if it can properly detect recurrent child links
      link = stateless_recurrent.StatelessRecurrentChainList(
          L.Linear(3, 4),
          L.NStepLSTM(1, 3, 2, 0),
          L.Linear(4, 5),
          stateless_recurrent.StatelessRecurrentChainList(
              L.NStepRNNTanh(1, 2, 5, 0),
          ),
      )
      self.assertEqual(len(link.recurrent_children), 2)
      self.assertIs(link.recurrent_children[0], link[1])
      self.assertIs(link.recurrent_children[1], link[3])
      self.assertEqual(
          len(link.recurrent_children[1].recurrent_children), 1
      )
      self.assertIs(
          link.recurrent_children[1].recurrent_children[0], link[3][0]
      )
  
imports: import unittest
  from chainer import links
  from chainer import testing
  import numpy
  from chainerrl.links import stateless_recurrent
label_desc: Use image node_id 1 for calling the TestStatelessRecurrentChainList obj's underlying member method code with example usage: obj.test() without return types