code: def _fit_with_callback_integration(self, callback):
      self.model.fit_generator(
          self.train_gen,
          self.valid_gen,
          epochs=LRSchedulersTest.epochs,
          steps_per_epoch=LRSchedulersTest.steps_per_epoch,
          callbacks=[callback],
      )
  
file_path: poutyne/tests/framework/callbacks/test_lr_scheduler.py
imports: import unittest
  from unittest import TestCase
  import torch
  import torch.nn
  from poutyne import CosineAnnealingLR, ExponentialLR, LambdaLR, Model, MultiStepLR, ReduceLROnPlateau, StepLR
  from tests.framework.tools import some_data_generator
label_desc: Use image node_id 8 for calling the LRSchedulersTest obj's underlying member method code with example usage: obj._fit_with_callback_integration(callback) without return types