code: def render(self, mode="human"):
      raise NotImplementedError(
          "Render is not implemented for Synchronous Environment"
      )
  
file_path: keras-rl/rl/common/vec_env/subproc_env_vec.py
imports: import numpy
  from multiprocessing import Process, Pipe
  from rl.common.vec_env import VecEnv, CloudpickleWrapper
  from rl.common.tile_images import tile_images
label_desc: Use image node_id 7 for calling the SubprocVecEnv obj's underlying member method code with example usage: obj.render(mode) without return types