if(relation instanceof UnresolvedCHRRelation) {
UnresolvedCHRRelation unresolved = (UnresolvedCHRRelation)relation;
CHRConstraint constraint = context.resolveCHRConstraint(unresolved.name);
if(relation instanceof UnresolvedCHRRelation) {
UnresolvedCHRRelation unresolved = (UnresolvedCHRRelation)relation;
CHRConstraint constraint = context.resolveCHRConstraint(unresolved.name);