@classmethod
def getSystemMessages(cls):
    """Gets the SystemMessages for this application. SystemMessages are
        used to notify the user of various critical situations that can occur,
        such as session expiration, client/server out of sync, and internal
        server error.

        You can customize the messages by "overriding" this method and
        returning L{CustomizedSystemMessages}. To "override" this method,
        re-implement this method in your application (the class that extends
        L{Application}). Even though overriding class methods is not
        possible in Python, Muntjac selects to call the static method from the
        subclass instead of the original L{getSystemMessages} if such a
        method exists.

        @return: the SystemMessages for this application
        """
    return cls._DEFAULT_SYSTEM_MESSAGES
