def _get(self, key, identity='image'):
        """
        Deserializing, prefix wrapper for _get_raw
        """
        value = self._get_raw(add_prefix(key, identity))

        if not value:
            return None

        if identity == 'image':
            return deserialize_image_file(value)

        return deserialize(value)
Deserializing, prefix wrapper for _get_raw