code: def setup_method(self):
      self.env = GymEnv(DummyDictEnv())
      self.obs = self.env.reset()[0]
      self._replay_k = 4
      self.replay_buffer = HERReplayBuffer(
          env_spec=self.env.spec,
          capacity_in_transitions=10,
          replay_k=self._replay_k,
          reward_fn=self.env.compute_reward,
      )
  
file_path: garage/tests/garage/replay_buffer/test_her_replay_buffer.py
imports: import pickle
  import numpy
  import pytest
  from garage.envs import GymEnv
  from garage.replay_buffer import HERReplayBuffer
  from tests.fixtures.envs.dummy import DummyDictEnv
label_desc: Use image node_id 1 for calling the TestHerReplayBuffer obj's underlying member method code with example usage: obj.setup_method() without return types