GWT contextual gadget in Eclipse

Hello everyone.
I'm a newcomer in GWT and I can't understand how to create GWT contextual gadged, which would be hosted an Google Apps Engine.
The problem is there is no parametr view="card" in compiled gwt gadget even if I use @ContentType(views={"card"}) in my java class.
I understand I can edit compiled myclass.gadget.xml in war directory and add this parametr but there is a big problem with its lost when publishing at google apps engine.
How to solve this problem ?

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