&$tokenTypes: supported token types in format 'type' => callback function
used to retrieve this type of tokens.
+'ApiValidatePassword': Called from ApiValidatePassword.
+$module: ApiValidatePassword instance.
+&$r: Result array.
+
'Article::MissingArticleConditions': Before fetching deletion & move log entries
to display a message of a non-existing page being deleted/moved, give extensions
a chance to hide their (unrelated) log entries.