def multicommand_get_command_short_help(self, ctx, cmd_name):
    """Returns the short help of a subcommand

    It allows MultiCommand subclasses to implement more efficient ways to provide the subcommand short help, for
    example by leveraging some caching.

    Parameters
    ----------
    ctx : click.core.Context
        The current context
    cmd_name :
        The sub command name

    Returns
    -------
    str
        The sub command short help
    """
    return self.get_command(ctx, cmd_name).short_help