bool isObligatory = aFactory->isCase(theFeature, theFeature->data()->id(aSel));
if (isObligatory)
aState = ModelAPI_StateInvalidArgument;
bool isObligatory = aFactory->isCase(theFeature, theFeature->data()->id(aSel));
if (isObligatory)
aState = ModelAPI_StateInvalidArgument;