public function __construct(DatasetMetaData $newLogicalDataset) {
        parent::__construct();

        $metamodel = data_controller_get_metamodel();

        $this->newLogicalDataset = $newLogicalDataset;

        $cubeName = $newLogicalDataset->name;
        $this->newCube = $metamodel->getCube($cubeName);
    }
    public function __construct(DatasetMetaData $logicalDataset) {
        parent::__construct();

        $this->logicalDataset = $logicalDataset;
    }