def METHOD_NAME():
    '''Load indexed dataset meta-infos.'''
    # Load json.
    path = get_indexed_dataset_infos_path()
    with open(path) as f:
        infos = json.load(f)
    # Add indexed datasets.
    for info in infos:
        info["dataset"] = make_indexed_dataset(info["prefix"], "mmap", True)
    return infos