Wth is that, that is the most anti-idiomatic code I have ever seen

https://github.com/rustdesk/rustdesk/blob/master/src%2Fplatform%2Flinux.rs#L176

pub fn get_cursor() -> ResultType<Option<u64>> {
    let mut res = None;
    DISPLAY.with(|conn| {
        if let Ok(d) = conn.try_borrow_mut() {
            if !d.is_null() {
                unsafe {
                    let img = XFixesGetCursorImage(*d);
                    if !img.is_null() {
                        res = Some((*img).cursor_serial as u64);
                        XFree(img as _);
                    }
                }
            }
        }
    });
    Ok(res)
}

I'm not an expert but this seems wrong.