/**
* @param CalendarDate|Object $start
* @param CalendarDate|HasClassName $end
*/
protected function __construct(CalendarDate $start, CalendarDate $end)
{
if (!$end->sameTypeAs($start)) {
throw new NotMatchTypeException($end);
}
if ($end->earlierThan($start)) {
throw new InvalidArgumentException(sprintf('%s must be later then %s', '$end', '$start'));
}
$this->start = $start;
$this->end = $end;
}