code: def test_constant_eta(self):
      gin.parse_config(
          [
              "selectors.eta_scheduler.values=(0.5,)",
              "selectors.eta_scheduler.breakpoints=()",
          ]
      )
      self.assertEqual(0.5, selectors.eta_scheduler(1))
      self.assertEqual(0.5, selectors.eta_scheduler(100))
  
file_path: neural-structured-learning/research/multi_representation_adversary/multi_representation_adversary/selectors_test.py
imports: import gin
  from multi_representation_adversary import selectors
  import tensorflow.compat.v2
label_desc: Use image node_id 1 for calling the EtaSchedulerTest obj's underlying member method code with example usage: obj.test_constant_eta() without return types