Assigning to nested QVariantMap

[fas.ysk]

Hi,
is there any way to do simple access to nested QVariantMap ?
Something like:
@
// cJsonMessag is a big and nested json
QJsonDocument msgDoc = QJsonDocument::fromJson(cJsonMessage);
qvMap = msgDoc.object().toVariantMap();
//just dreams :)
getVal(qvMap , outVal, "obj0.obj1[0].obj2.param");
setVal(qvMap , QVariant("test"), "obj0.obj1[0].obj2.param");
@