I cannot find a way to either disable (a'la checkstyle project or global settigns) or bypass GWT designer warnings about widgets classes that do not have default no-argument constructor,
Composite AboutPanel has no default constructor, so can not be used with GWT Designer.
I have 3rd party jar in source path with widgets not intended to use in Design mode but at runtime, That's 3rd party .jar so I cannot modify sources (which would also make no sense becuase of widgets design similiar to dependency injection),
I think that feature (code checks) is built into GWT Designer plugin itself, am I correct?
That's rather cosmetic thing becuase that are just warnings