I have a super-class implementing 2 traits:

class CRUDController<T extends MongoEntity> implements ControllerTrait, I18nTrait {...}

and it's sub-class:

class ScreenController extends CRUDController<Screen> {...}

The Eclipse of Version: 2021-03 (4.19.0) with Eclipse Groovy Development Tools 4.2.0.v202106101948-e2103 complains in a sub-class about not implemented methods and as quick fixes suggests to either make the class abstract or implement the methods:

The traits must supported also in sub-classes as they are compiled by Groovy compiler (ver. 3) just fine.