FileItem::fillFile

public function fillFile(): self
{
	if (isset($this->entity))
	{
		return $this;
	}

	$fileEntity = BitrixImV2EntityFileFileItem::initByDiskFileId($this->getEntityId(), $this->getChatId());

	if ($fileEntity !== null)
	{
		$this->setEntity($fileEntity);
	}

	return $this;
}