/**
* @return MessageIndex
*/
public static function singleton() {
if ( self::$instance === null ) {
global $wgTranslateMessageIndex;
$params = $wgTranslateMessageIndex;
$class = array_shift( $params );
self::$instance = new $class( $params );
}
return self::$instance;
}
/**
* Override the global instance, for testing.
* @since 2015.04
*/
public static function setInstance(self $instance)
{
self::$instance = $instance;
}
