Messages regarding any member of a FAS group

    Use this rule to include messages that have anything to do with **any
    user** belonging to a particular fas group.  You might want to use this
    to monitor the activity of a group for which you are responsible.

def fas_group_member_filter(config, message, group=None, *args, **kw):
    """ Messages regarding any member of a FAS group

    Use this rule to include messages that have anything to do with **any
    user** belonging to a particular fas group.  You might want to use this
    to monitor the activity of a group for which you are responsible.
    """
    if not group:
        return False
    fasusers = _get_users_of_group(config, group)
    msgusers = fmn.rules.utils.msg2usernames(message, **config)
    return bool(fasusers.intersection(msgusers))