public function virtualToScalable($event)
    {
        if (($this->scalableAttributeName() !== null) &&
        ($this->virtualAttributesNames() !== null)) {

            $data = [];
            foreach ($this->virtualAttributesNames() as $name) {
                if (!empty($this->owner->{$name})) {
                    $data[$name] = $this->owner->{$name};
                }
            }

            $this->owner->{$this->scalableAttributeName()} = $this->convert($data);
        }
    }