Storage::getRootObject

public function getRootObject()
{
	if(!$this->rootObjectId)
	{
		return null;
	}

	if(isset($this->rootObject) && $this->rootObjectId === $this->rootObject->getId())
	{
		return $this->rootObject;
	}
	//todo - Storage - knows about Folder ^( Nu i pust'
	$this->rootObject = Folder::loadById($this->rootObjectId);

	return $this->rootObject;
}