Jackalope\Property::addValue PHP Метод

    public function addValue($value)
    {
        $this->checkState();
        if (!$this->isMultiple()) {
            throw new ValueFormatException('You can not add values to non-multiple properties');
        }
        $this->value[] = $this->valueConverter->convertType($value, $this->type);
        $this->setModified();
    }