code: def test_call(self):
      logits = self._ranker(inputs=self._features)
      self.assertAllEqual([[1, 1], [1, 1]], logits)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow.compat.v2
  from tensorflow_ranking.python.keras import network
label_desc: Use image node_id 4 for calling the BaseRankingNetworkTest obj's underlying member method code with example usage: obj.test_call() without return types