evaluate method
Implementation
@override
bool? evaluate(QuestionnaireState state) {
return state.hasAnswer<V>(target!)
? checkValue(state.getAnswer<V>(target!))
: null;
}
@override
bool? evaluate(QuestionnaireState state) {
return state.hasAnswer<V>(target!)
? checkValue(state.getAnswer<V>(target!))
: null;
}