code: def on_init(self, event):
      self.text = Text(
          "Initialized",
          font_size=40.0,
          anchor_x="left",
          anchor_y="top",
          parent=[self.vb_0.scene, self.vb_1.scene],
      )
  
file_path: vispy/examples/tutorial/app/shared_context.py
imports: from PyQt5 import QtWidgets, QtCore
  from functools import partial
  from vispy.app import Timer
  from vispy.scene.visuals import Text
  from vispy.scene.widgets import ViewBox
  from vispy.scene import SceneCanvas
label_desc: Use image node_id 2 for calling the Window obj's underlying member method code with example usage: obj.on_init(event) without return types