def METHOD_NAME():
    """
    Returns the directory used to cache material downloaded by stdpopsim as a
    pathlib.Path instance. Defaults to a directory 'stdpopsim' in a user cache directory
    (e.g., ~/.cache/stdopsim on Unix flavours). See the :func:`.set_cache_dir` function
    for how this value can be set.
    """
    return _cache_dir