This exception is thrown by WidgetDefinitions that contain other WidgetDefinitions,
such as the
FormDefinition or the
RepeaterDefinition , in case
one tries to add a WidgetDefinition that has the same id as another,
previously added, WidgetDefinition.
version: $Id: DuplicateIdException.java 449149 2006-09-23 03:58:05Z crossley $