class_docstr: EGL backend for Canvas abstract class.
code: def _vispy_set_visible(self, visible):
      pass
  
imports: from __future__ import division
  import atexit
  from time import sleep
  from ..base import BaseApplicationBackend, BaseCanvasBackend, BaseTimerBackend
  from ...util.ptime import time
  from ...None import config
label_desc: Use image node_id 9 for calling the CanvasBackend obj's underlying member method code with example usage: obj._vispy_set_visible(visible) without return types