Pimcore\Model\Object\Data\Link::setObjectFromId PHP Method

    public function setObjectFromId()
    {
        if ($this->internalType == "document") {
            $this->object = Document::getById($this->internal);
        } elseif ($this->internalType == "asset") {
            $this->object = Asset::getById($this->internal);
        }
        return $this->object;
    }