Missing `download_split_indices()`

[cgoliver]

The docstring for download_dataset() mentions the function download_split_indices() to get split indices in raw datasets but searching through the source code I don't see where that is defined.

def download_dataset(name, out_path, split=None):
    """Download an ATOM3D dataset in LMDB format. Available datasets are SMP, PIP, RES, MSP, LBA, LEP, PSR, RSR. Please see `FAQ <datasets target>`_ or `atom3d.ai <atom3d.ai>`_ for more details on each dataset.
    :param name: Three-letter code for dataset (not case-sensitive).
    :type name: str
    :param out_path: Path to directory in which to save downloaded dataset.
    :type out_path: str
    :param split: name of split data to download in LMDB format. Defaults to None, in which case raw (unsplit) dataset is downloaded. Please use :func:`download_split_indices` to get pre-computed split indices for raw datasets.
    :type split: str
    """