Equivalent of Swing miglayout in vaadin?

Does an Equivalent of Swing miglayout exist in vaadin?

Probably not.

MigLayout seems to be written to be very portable and its core does not depend on Swing at all, but I wonder how big a task it would be to try to port it to a framework like Vaadin. Also, it is not quite clear to me which parts should run on the server side and which on the client in that case, and how much calculation would need to be performed on the client side - I have not looked at its internals.