}
/**
- * @param string $markName The name of the mark that should
+ * @param string|null $markName The name of the mark that should
* be cleared. If not specified, all marks will be cleared.
*/
public function clearMarks( $markName = null ) {
*
* @param string $measureName
* @param string $startMark
- * @param string $endMark
+ * @param string|null $endMark
* @return array|bool The measure that has been created, or false if either
* the start mark or the end mark do not exist.
*/