/**
* do version specific magic here
*
* @param \Sabre\VObject\Component\VCalendar $vcalendar
* @return \Sabre\VObject\Component\VCalendar | null
*/
protected function _findMainEvent(\Sabre\VObject\Component\VCalendar $vcalendar)
{
$return = parent::_findMainEvent($vcalendar);
// NOTE 10.7 and 10.10 sometimes write access into calendar property
if (isset($vcalendar->{'X-CALENDARSERVER-ACCESS'})) {
foreach ($vcalendar->VEVENT as $vevent) {
$vevent->{'X-CALENDARSERVER-ACCESS'} = $vcalendar->{'X-CALENDARSERVER-ACCESS'};
}
}
return $return;
}
