code: def test_abc_discrete_fast(self):
      self._test_abc(
          self.t_max,
          self.use_lstm,
          episodic=self.episodic,
          steps=10,
          require_success=False,
      )
  
imports: import logging
  import os
  import tempfile
  import unittest
  import warnings
  import chainer
  from chainer import functions
  from chainer import links
  from chainer import testing
  from chainerrl.agents import a3c
  from chainerrl.envs.abc import ABC
  from chainerrl.experiments.train_agent_async import train_agent_async
  from chainerrl import policies
  from chainerrl import v_function
label_desc: Use image node_id 3 for calling the TestA3C obj's underlying member method code with example usage: obj.test_abc_discrete_fast() without return types