'Get any administrator notice messages for these capabilities.
Returns:
A string containing one or more admin messages, or an empty string.
Raises:
UnknownCapabilityError, if a specified capability was not recognized.'

def admin_message(self):

    message_list = []
    for config in self._get_status().config_list():
        message = config.admin_message()
        if (message and (message not in message_list)):
            message_list.append(message)
    return '        '.join(message_list)
