def _find_subcommand(args):
    """Return the subcommand that has been passed, if any.

    Parameters
    ----------
    args : list
        The argument list.

    Returns
    -------
    Optional[:class:`str`]
        If a subcommand is found, returns the string of its name.  Returns None
        otherwise.

    Notes
    -----
    This assumes that "manim" is the first word in the argument list, and that
    the subcommand will be the second word, if it exists.

    """
    subcmd = args[1]
    if subcmd in [
        "cfg"
        # , 'init',
    ]:
        return subcmd
    else:
        return None