code: def test_save_load(self):
      a = self.create_agent(self.env)
      dirname = tempfile.mkdtemp()
      a.save(dirname)
      self.assertTrue(os.path.exists(dirname))
      b = self.create_agent(self.env)
      b.load(dirname)
  
file_path: chainerrl/tests/agents_tests/basetest_agents.py
imports: import os
  import tempfile
  import unittest
  from chainer import testing
  from chainerrl.envs.abc import ABC
  from chainerrl.experiments.train_agent import train_agent
label_desc: Use image node_id 3 for calling the _TestAgentInterface obj's underlying member method code with example usage: obj.test_save_load() without return types