code: def _set_config(c):
      """Set gl configuration for template.
      Currently not used for Tkinter backend.
      """
      return []
  
imports: from __future__ import division
  from time import sleep
  import warnings
  from ..base import BaseApplicationBackend, BaseCanvasBackend, BaseTimerBackend
  from ...util import keys
  from ...util.ptime import time
  from ...gloo import gl
label_desc: Use image node_id 1 for calling a global function with example usage: _set_config(c) and returns: list