Mongolid\Serializer\Type\UTCDateTime::init PHP Method

    protected function init($datetime)
    {
        if (is_null($datetime)) {
            $datetime = time();
        }
        if (is_int($datetime)) {
            $this->timestamp = $datetime * 1000;
            $this->mongoDate = new MongoUTCDateTime($this->timestamp);
            return true;
        }
        if ($datetime instanceof MongoUTCDateTime) {
            $this->mongoDate = $datetime;
            $this->timestamp = $datetime->toDateTime()->getTimestamp() * 1000;
            return true;
        }
        return false;
    }