code: def on_delete(self, callback):
      return self._subscribe("on_delete", "view_method", callback)
  
imports: import asyncio
  from random import random
  from functools import partial
  from .dispatch import async_queue, subscribe, unsubscribe
label_desc: Use image node_id 16 for calling the PerspectiveViewProxy obj's underlying member method code with example usage: obj.on_delete(callback) and returns: self