code: def on_draw(self, event):
      self.context.clear("white")
      self.cube.draw()
  
file_path: vispy/examples/basics/visuals/arcball.py
imports: import sys
  import numpy
  from vispy import app
  from vispy.visuals import BoxVisual, transforms
  from vispy.util.quaternion import Quaternion
label_desc: Use image node_id 3 for calling the Canvas obj's underlying member method code with example usage: obj.on_draw(event) without return types