def get_resource_ids(self):
        """
        Get resource ids as a list.

        :return: List of resource id:s or "unknown"
        """
        resids = []
        if self.dutinformations:
            for info in self.dutinformations:
                resids.append(info.resource_id)
            return resids
        return "unknown"
Get resource ids as a list.

        :return: List of resource id:s or "unknown"