code: def test_get_model_ids(self):
      alg = TestAlgorithm2()
      agent = TestAgent(alg)
      expected_model_ids = set(["id{}".format(i + 1) for i in range(8)])
      self.assertSetEqual(expected_model_ids, agent.get_model_ids())
  
imports: import unittest
  import parl
label_desc: Use image node_id 5 for calling the AgentBaseTest obj's underlying member method code with example usage: obj.test_get_model_ids() without return types