tests/org.eclipse.m2m.tests.qvt.oml/unparserTestData/sources/voidreturn/voidreturn.qvto

transformation voidreturn;
modeltype ECORE uses 'http://www.eclipse.org/emf/2002/Ecore';

mapping main(pack: ecore::EPackage): ecore::EPackage {
    init {
        result := object ecore::EPackage { name := pack.name; };
        var foo := patch(result);
    }
        name := pack.name;    
}

query patch(inout pack: ecore::EPackage): OclVoid {
   return null;
}