[xwiki-users] Controlling not only contents but also page titles in class instances

Hello! My experience with classes in XWiki is obtained after creating a Todo application. The tutorial is published here: http://www.theserverside.com/news/1363830/XWiki-A-Platform-for-Collaborativ… It is obsoleted, but I've got the basics. There is a class fabric at XWiki.XWikiClasses. It is straightforward to create a Class, a Sheet and a Template using this fabric. Sheet is being used to hold control over presentation of increasing number of class instances and Template injects a reference to Sheet in new instances. Everything is fine, but I don't understand how to hold control over page titles. That is, if once in a blue moon I will want to change title format from $doc.getObject('SomeSpace.SomeClass').get('SomeField') to something different, every class instance must be affected (except those ones which have their title edited manually). My naive tries don't work as expected. Is it ever possible? -- If you want to get to the top, you have to start at the bottom