code: def reset_model(self):
      self.set_state(
          self.init_qpos
          + self.np_random.uniform(
              low=-0.1, high=0.1, size=self.model.nq
          ),
          self.init_qvel
          + self.np_random.uniform(
              low=-0.1, high=0.1, size=self.model.nv
          ),
      )
      return self._get_obs()
  
file_path: gym/gym/envs/mujoco/swimmer.py
imports: import numpy
  from gym import utils
  from gym.envs.mujoco import MuJocoPyEnv
  from gym.spaces import Box
label_desc: Use image node_id 4 for calling the SwimmerEnv obj's underlying member method code with example usage: obj.reset_model() and returns: self