code: def test_proper_init_with_callback_element(self):
      delay_callback = DelayCallback([self.mock_callback])
      self.assertTrue(
          isinstance(delay_callback.callbacks, CallbackList)
      )
  
      delay_callback = DelayCallback(self.mock_callback)
      self.assertTrue(
          isinstance(delay_callback.callbacks, CallbackList)
      )
  
file_path: poutyne/tests/framework/callbacks/test_delay.py
imports: import unittest
  from unittest import TestCase
  from unittest.mock import ANY, MagicMock, call
  import torch
  import torch.nn
  from poutyne import Callback, CallbackList, DelayCallback, Model
  from tests.framework.tools import some_data_generator
label_desc: Use image node_id 6 for calling the DelayCallbackTest obj's underlying member method code with example usage: obj.test_proper_init_with_callback_element() without return types