FredBezies [1] filed a deletion request for xfce4-snw-plugin [2]: Dead upstream: "Project is temporarily suspended. I won't be able to support my projects until 2018 spring"
And last commit was made in 2017. [1] https://aur.archlinux.org/account/FredBezies/ [2] https://aur.archlinux.org/pkgbase/xfce4-snw-plugin/