@app.exception_handler(UnicornException)
        async def unicorn_exception_handler(request: Request, exc: UnicornException):
            return JSONResponse(
                status_code=418,
                content={"message": f"Oops! {exc.name} did something. There goes a rainbow..."},
            )
        ```
        """

        def decorator(func: DecoratedCallable) -> DecoratedCallable:

                            content_type_value = request.headers.get("content-type")
                            if not content_type_value:
                                json_body = await request.json()
                            else:
                                message = email.message.Message()
                                message["content-type"] = content_type_value