How to use the ariadne.constants.PLAYGROUND_HTML.encode function in ariadne

def handle_get(self, start_response) -> List[bytes]:
        start_response(HTTP_STATUS_200_OK, [("Content-Type", CONTENT_TYPE_TEXT_HTML)])
        return [PLAYGROUND_HTML.encode("utf-8")]

async def handle_get(self) -> None:
        await self.send_response(
            200,
            PLAYGROUND_HTML.encode("utf-8"),
            headers=[(b"Content-Type", CONTENT_TYPE_TEXT_HTML.encode("utf-8"))],
        )

def handle_get(self, start_response) -> List[bytes]:
        start_response(HTTP_STATUS_200_OK, [("Content-Type", CONTENT_TYPE_TEXT_HTML)])
        return [PLAYGROUND_HTML.encode("utf-8")]