type MyRef = ref object
myProp: int
proc doSmt(mr: MyRef) =
mr.myProp = 5
let a = MyRef(myProp: 10)
doSmT a
echo repr(a)
dHlwZSBNeVJlZiA9IHJlZiBvYmplY3QKICBteVByb3A6IGludAogIApwcm9jIGRvU210KG1yOiBNeVJlZikgPQogIG1yLm15UHJvcCA9IDUKICAKbGV0IGEgPSBNeVJlZihteVByb3A6IDEwKQpkb1NtVCBhCmVjaG8gcmVwcihhKQ==