229     protected $byHour;  variable in Sabre\\VObject\\Recur\\RRuleIterator
337         if (!$this->byHour && !$this->byDay) {
342         if (isset($this->byHour)) {
355             if ($this->byHour) {
379             ($this->byHour  && !in_array($currentHour, $recurrenceHours)) ||
392         if (!$this->byHour && !$this->byDay) {
397         if ($this->byHour) {
410             if ($this->byHour) {
423             if ($currentDay === $firstDay && (!$this->byHour || $currentHour == '0')) {
434 …} while (($this->byDay && !in_array($currentDay, $recurrenceDays)) || ($this->byHour && !in_array(…
677                     $this->byHour = (array)$value;
873         foreach($this->byHour as $byHour) {
874             $recurrenceHours[] = $byHour;