The UnusedUseStatementSniff is processing @see annoations as this can contains classes. But there can also linked to a url and in that case there should be no search for classes to recognized them as used
https://www.doxygen.nl/manual/commands.html#cmdsa
The @see in this code avoids that the use Hooks is reported
... use Hooks; ... class WikimediaEventsHooks { ... /** ... * @see https://www.mediawiki.org/wiki/Manual:Hooks/PageSaveComplete */ public static function onPageSaveComplete( ...