SpringSource/spring-framework — pull request #199 by rwinch (2012-12-10 19:19:55+00:00)
Title: Make DeferredResult extensible

Previously it was combersome to associate data or behavior to a
DeferredResult because it was marked as final and had no extension
points.

Now DeferredResult is non-final which allows subclasses to associate
additional data and behavior to it.

Issue: SPR-10059