docs: def create_mailing_lists(self, verbose=True):
          """Creates the mailing list for each registered notification.
          """
          responses = {}
          if (
              settings.EMAIL_ENABLED
              and self.loaded
              and settings.EMAIL_BACKEND
              != "django.core.mail.backends.locmem.EmailBackend"
          ):
              sys.stdout.write(style.MIGRATE_HEADING(f"Creating mailing lists:\n"))
              for name, notification_cls in self.registry.items():
                  message = None
                  notification = notification_cls()
                  manager = MailingListManager(
                      address=notification.email_to,
                      name=notification.name,
                      display_name=notification.display_name,
                  )
                  try:
                      response = manager.create()
                  except ConnectionError as e:
                      sys.stdout.write(
                          style.ERROR(
                              f"  * Failed to create mailing list {name}. " f"Got {e}\n"
                          )
                      )
                  else:
                      if verbose:
                          try:
                              message = response.json().get("message")
                          except JSONDecodeError:
                              message = response.text
                          sys.stdout.write(
                              f"  * Creating mailing list {name}. "
                              f'Got {response.status_code}: "{message}"\n'
                          )
                      responses.update({name: response})
          return responses