Sharing::getRealStorage

public function getRealStorage()
{
	if(!$this->realStorageId)
	{
		return null;
	}

	if(isset($this->realStorage) && $this->realStorageId === $this->realStorage->getId())
	{
		return $this->realStorage;
	}
	$this->realStorage = Storage::loadById($this->realStorageId);

	return $this->realStorage;
}