$title: Title object that is being checked
$result: Boolean; whether MediaWiki currently thinks this is a CSS/JS page. Hooks may change this value to override the return value of Title::isCssOrJsPage()
+'TitleIsKnown': Called when determining if a page exists.
+Allows overriding default behaviour for determining if a page exists.
+If $isKnown is kept as null, regular checks happen. If it's a boolean, this value is returned by the isKnown method.
+$title: Title object that is being checked
+$result: Boolean|null; whether MediaWiki currently thinks this page is known
+
'TitleIsMovable': Called when determining if it is possible to move a page.
Note that this hook is not called for interwiki pages or pages in immovable namespaces: for these, isMovable() always returns false.
$title: Title object that is being checked