code: def _vispy_process_events(self):
      # pyglet.app.platform_event_loop.step(0.0)
      pyglet.clock.tick()
      for window in pyglet.app.windows:
          window.switch_to()
          window.dispatch_events()
          window.dispatch_event("on_draw")
  
imports: from __future__ import division
  from packaging.version import Version
  from time import sleep
  from ..base import BaseApplicationBackend, BaseCanvasBackend, BaseTimerBackend
  from ...util import keys
  from ...util.ptime import time
  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