public static function fetchByContentObjectID( $contentObjectID, $asObject = true, $contentObjectVersion = false )
    {
        $conds = array( 'contentobject_id' => $contentObjectID );
        if ( $contentObjectVersion !== false )
        {
            $conds['contentobject_version'] = $contentObjectVersion;
        }

        return self::fetchObject(
            self::definition(),
            null,
            $conds,
            $asObject
        );
    }