old_contents: from django.conf import settings
  from django.utils.translation import ugettext_lazy as _
  
  
  DEFAULT_FORM_FIELDS_ID = 'contact-%s'
  FORM_FIELDS_ID = getattr(
      settings, 'CMS_FEEDBACK_FORM_FIELD_ID', DEFAULT_FORM_FIELDS_ID)
  
  DEFAULT_FORM_CLASS = 'contact-form'
  FORM_CLASS = getattr(
      settings, 'CMS_FEEDBACK_FORM_CSS_CLASS', DEFAULT_FORM_CLASS)
  
  NOTIFY_MANAGERS = getattr(
      settings, 'CMS_FEEDBACK_NOTIFY_MANAGERS', True)
  
  DEFAULT_NOTIFY_SUBJECT = _('New feedback')
  NOTIFY_SUBJECT = getattr(
      settings, 'CMS_FEEDBACK_NOTIFY_SUBJECT', DEFAULT_NOTIFY_SUBJECT)
  
new_contents: from django.conf import settings
  from django.utils.translation import ugettext_lazy as _
  
  NOTIFY_MANAGERS = getattr(
      settings, 'CMS_FEEDBACK_NOTIFY_MANAGERS', True)
  
  DEFAULT_NOTIFY_SUBJECT = _('New feedback')
  NOTIFY_SUBJECT = getattr(
      settings, 'CMS_FEEDBACK_NOTIFY_SUBJECT', DEFAULT_NOTIFY_SUBJECT)
  
subject: remove deprecated settings