boolean isHistoryEnabled() {
        Type strategyType = type;
        if (type == Type.defaulType && parent != null) {
            strategyType = parent.getType();
        }
        return strategyType != HistoryStrategy.Type.none;
    }
Add a message(s) to the current chat history. The strategy type will determine what
actually happens to the message.

@param packets The messages to add to the chatroom's history.
xmppserver/src/main/java/org/jivesoftware/openfire/muc/HistoryStrategy.java