Using GWTDesigner in UIBinder mode to display 3rd party widgets

Hi I'm trying to display smartGWT widgets in UIBinder mode. I'm using https://code.google.com/p/uibinding-smartgwt/ to do this and I had to modify the existing code to get the GWTDesigner to compile things correctly. Now I'm getting this error: java.lang.AssertionError: This UIObject's eleme

GWTDesigner in UIBinder mode Opening layout xml file with SmartGWT widgets

Hi, I'm using Eclipse Kepler with GWT 2.6.1 and GWT Designer for GPE (recommended) WindowBuilder Core1.6.0.r43x201305211944 WindowBuilder XML Core (requires Eclipse WTP/WST) 1.6.0.r43x201306031653 I have no problem opening vanilla GWT UIBinder layouts, however when I try