old_contents: from django.conf import settings
  from django.utils.module_loading import import_by_path
  
  BACKEND = getattr(settings.configure(), 'CELERY_PROGRESS_BACKEND',
                    'celery_progress.backends.CeleryBackend')
  
  
  def get_backend():
      return import_by_path(BACKEND)
  
  
  backend = get_backend()()
  
new_contents: from django.conf import settings
  from django.utils.module_loading import import_by_path
  
  BACKEND = getattr(settings, 'CELERY_PROGRESS_BACKEND',
                    'celery_progress.backends.CeleryBackend')
  
  
  def get_backend():
      return import_by_path(BACKEND)
  
  
  backend = get_backend()()
  
subject: Revert the last change