docstr: This method must be overwritten by child class.
docstr_tok: ["This","method","must","be","overwritten","by","child","class","."]
code: def _run(self) -> Any:
      """
      This method must be overwritten by child class.
      """
      raise NotImplementedError
  
file_path: stable-baselines/stable_baselines/common/runners.py
imports: from abc import ABC, abstractmethod
  import typing
  from typing import Union, Optional, Any
  import gym
  import numpy
  from stable_baselines.common.callbacks import BaseCallback
  from stable_baselines.common.vec_env import VecEnv
label_desc: Use image node_id 3 for calling the AbstractEnvRunner obj's underlying member method code with example usage: obj._run() without return types