code: def test_has_handler_on_callable_events():
      engine = Engine(lambda e, b: 1)
  
      def foo(e):
          pass
  
      assert not engine.has_event_handler(foo)
  
      engine.add_event_handler(Events.EPOCH_STARTED, foo)
      assert engine.has_event_handler(foo)
  
      def bar(e):
          pass
  
      engine.add_event_handler(Events.EPOCH_COMPLETED(every=3), bar)
      assert engine.has_event_handler(bar)
      assert engine.has_event_handler(bar, Events.EPOCH_COMPLETED)
      assert engine.has_event_handler(
          bar, Events.EPOCH_COMPLETED(every=3)
      )
  
imports: from enum import Enum
  from unittest.mock import MagicMock
  import pytest
  import torch
  import ignite.distributed
  from ignite.engine import Engine, Events
  from ignite.engine.events import CallableEventWithFilter, EventEnum, EventsList
label_desc: Use image node_id 8 for calling a global function with example usage: test_has_handler_on_callable_events() without return types