note 79798 added to language.pseudo-types

Would someone (i.e. the document maintainer or else a kind reader or two) please explain what/how the 'mixed' pseudo type is used, along with some examples? This documentation page is extremely brief and not at all clear on the subject. I've also tried looking through other code I've found and cannot seem to find anybody actually using it. -- Thanks very much. ---- Server IP: 208.69.120.35 Probable Submitter: 149.101.1.125 ---- Manual Page -- http://www.php.net/manual/en/language.pseudo-types.php Edit -- https://master.php.net/note/edit/79798 Del: integrated -- https://master.php.net/note/delete/79798/integrated Del: useless -- https://master.php.net/note/delete/79798/useless Del: bad code -- https://master.php.net/note/delete/79798/bad+code Del: spam -- https://master.php.net/note/delete/79798/spam Del: non-english -- https://master.php.net/note/delete/79798/non-english Del: in docs -- https://master.php.net/note/delete/79798/in+docs Del: other reasons-- https://master.php.net/note/delete/79798 Reject -- https://master.php.net/note/reject/79798 Search -- https://master.php.net/manage/user-notes.php