Hi everyone, Using grails6, i'm trying to get the converter the org.grails.web.converters.marshaller.json.GenericJavaBeanMarshaller to add the class attribute to the generated json, (to ensure some backward compatibility) I guess i should use the includes property of the org.grails.web.converters.AbstractConverter but i can't understand how to. Any idea ? BTW: I'm allready using the grails.converters.domain.include.class = true, it's working for the domain classes, but i need the class attribute to be added to the grails.validation.ValidationException