def _get_application_settings(self, application_id, settings_key, error_message):
		"""Legacy behaviour"""

		if not application_id:
			value = SETTINGS.get(settings_key, empty)
			if value is empty:
				raise ImproperlyConfigured(error_message)
			return value
		else:
			msg = (
				"LegacySettings does not support application_id. To enable "
				"multiple application support, use push_notifications.conf.AppSettings."
			)
			raise ImproperlyConfigured(msg)