apache/wicket — pull request #52 by raphw (2013-09-16 13:46:05+00:00)
Title: Allow error messages to be represented by a model instead of a Serializable

Doing so allows other threads then the main thread to define application-dependent (for example localized) error messages. In general, I believe this model representation is more conform to the "Wicket-way" of doing things.

Jira-Issue: WICKET-5353