A uitoolkit::* tag seems to be missing, since the package has interface interface::x11.
90% of package with tags of facets (x11, implemented-in) also have tags of facet uitoolkit
90% of package with tags of facets (x11, works-with-format) also have tags of facet uitoolkit
90% of package with tags of facets (x11, interface) also have tags of facet uitoolkit
90% of package with tags of facets (x11, works-with) also have tags of facet uitoolkit
92% of package with tags of facets (x11, sound) also have tags of facet uitoolkit
93% of package with tags of facets (scope, x11) also have tags of facet uitoolkit