pub fn into_http<B: Default>(self) -> http::Response<B> {
        let mut response = http::Response::new(B::default());
        response
            .headers_mut()
            .insert(http::header::CONTENT_TYPE, GRPC_CONTENT_TYPE);
        self.add_header(response.headers_mut()).unwrap();
        response.extensions_mut().insert(self);
        response
    }
Build an `http::Response` from the given `Status`.
tonic/src/status.rs