code: def _vispy_stop(self):
      self._next_time = float("inf")
  
imports: from __future__ import division
  from ...util.ptime import time
  from ..base import BaseApplicationBackend, BaseCanvasBackend, BaseTimerBackend
  from ...gloo import gl
  from time import sleep
label_desc: Use image node_id 3 for calling the TimerBackend obj's underlying member method code with example usage: obj._vispy_stop() without return types