code: def _vispy_process_events(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 3 for calling the ApplicationBackend obj's underlying member method code with example usage: obj._vispy_process_events() without return types