How to use gwt-dispatch with its CachingDispatchAsync (GWT, GWTP)?

I found a link http://turbomanage.wordpress.com/2010/03/02/tips-for-using-cachingdispatchasync-with-gwt-dispatch/

But there is no step by step guideline for how to use it.

I am using GWTP (with Gwt2.5).

So Can you provide a very simple example how to use gwt-dispatch with its CachingDispatchAsync?

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