code: def test_set_and_get_model_id(self):
      model_id = "id1"
      self.model.set_model_id(model_id)
      self.assertEqual(model_id, self.model.get_model_id())
  
      model_id2 = "id2"
      self.model.model_id = model_id2
      self.assertEqual(model_id2, self.model.model_id)
  
imports: import numpy
  import paddle.fluid
  import parl
  import unittest
  from copy import deepcopy
  from paddle.fluid import ParamAttr
  from parl import layers
  from parl.utils import get_gpu_count
  from parl.core.fluid.plutils import fetch_value
label_desc: Use image node_id 2 for calling the ModelBaseTest obj's underlying member method code with example usage: obj.test_set_and_get_model_id() without return types