Spatie\GoogleCalendar\Event::__set PHP Method

    public function __set($name, $value)
    {
        $name = $this->getFieldName($name);
        if (in_array($name, ['start.date', 'end.date', 'start.dateTime', 'end.dateTime'])) {
            $this->setDateProperty($name, $value);
            return;
        }
        array_set($this->googleEvent, $name, $value);
    }