if (!aConstructionContext->facesNum()) // no faces, update can not work correctly
return setInvalidIfFalse(aSelLab, false);
// if there is no edges indexes, any face can be used: take the first
if (!aConstructionContext->facesNum()) // no faces, update can not work correctly
return setInvalidIfFalse(aSelLab, false);
// if there is no edges indexes, any face can be used: take the first