manolo/james-couchdb — comment on commit 2b6b0ebce5c78198b14d1e7ec05c178d56482919
File: src/main/java/org/apache/james/mailbox/couchdb/mail/model/CouchDbMailbox.java line 16
By manolo:

It is a good practice to define it in serializable classes. My eclipse displays a warning if the attribute is not defined for a serializable class.
http://www.javapractices.com/topic/TopicAction.do?Id=45