$user: User object representing user contributions are being fetched for
$sp: SpecialPage instance, providing context
+'SpecialContributions::formatRow::flags': Called before rendering a
+Special:Contributions row.
+$context: IContextSource object
+$row: Revision information from the database
+&$flags: List of flags on this row
+
'SpecialContributions::getForm::filters': Called with a list of filters to render
on Special:Contributions.
$sp: SpecialContributions object, for context