Returns a Dataset template used as a wrapper around the data
        contained within the multi-interface dataset.

def _inner_dataset_template(cls, dataset):
        """
        Returns a Dataset template used as a wrapper around the data
        contained within the multi-interface dataset.
        """
        from . import Dataset
        vdims = dataset.vdims if getattr(dataset, 'level', None) is None else []
        return Dataset(dataset.data[0], datatype=cls.subtypes,
                       kdims=dataset.kdims, vdims=vdims)