code: def is_healthy(self):
      z, angle = self.sim.data.qpos[1:3]
      state = self.state_vector()[2:]
  
      min_state, max_state = self._healthy_state_range
      min_z, max_z = self._healthy_z_range
      min_angle, max_angle = self._healthy_angle_range
  
      healthy_state = np.all(
          np.logical_and(min_state < state, state < max_state)
      )
      healthy_z = min_z < z < max_z
      healthy_angle = min_angle < angle < max_angle
  
      is_healthy = all((healthy_state, healthy_z, healthy_angle))
  
      return is_healthy
  
file_path: gym/gym/envs/mujoco/hopper_v3.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 HopperEnv obj's underlying member method code with example usage: obj.is_healthy() and returns: is_healthy