code: def _vispy_get_backend_name(self):
      return "jupyter_rfb"
  
imports: import asyncio
  from ..base import BaseApplicationBackend, BaseCanvasBackend, BaseTimerBackend
  from ...app import Timer
  from ...util import keys
  from ._offscreen_util import OffscreenContext, FrameBufferHelper
label_desc: Use image node_id 2 for calling the ApplicationBackend obj's underlying member method code with example usage: obj._vispy_get_backend_name() and returns: str