def help_group(uuid):
    """Label cli method with specific group.

    Joining methods by groups allows to compose more user-friendly help
    messages in CLI.

    :param uuid: Name of group to find common methods. It will be used for
        sorting groups in help message, so you can start uuid with
        some number (i.e "1_launcher", "2_management") to put groups in proper
        order. Note: default group had "0" uuid.
    """

    def wrapper(func):
        func.help_group = uuid
        return func
    return wrapper