Function async_google_apis_common::do_upload_multipart

pub async fn do_upload_multipart<Req: Serialize + Debug, Resp: DeserializeOwned + Clone>(
    cl: &TlsClient,
    path: &str,
    headers: &[(HeaderName, String)],
    http_method: &str,
    req: Option<Req>,
    data: Bytes
) -> Result<Resp>

The Content-Length header is set automatically.