code: def _vispy_run(self):
      raise NotImplementedError()
  
imports: from __future__ import division
  from ..base import BaseApplicationBackend, BaseCanvasBackend, BaseTimerBackend
  from ...util import keys
  from ...None import config
label_desc: Use image node_id 4 for calling the ApplicationBackend obj's underlying member method code with example usage: obj._vispy_run() without return types