}
// if local var is not set, then check map to see if existing holders are mapped to local var.
if (oldLocalToFirst.containsKey(var)) {
ValueHolderSub sub = oldToNew.get(oldLocalToFirst.lget());
if (sub.iden() == from.iden()) {
// if they are, then transfer to that.
from.transfer(this, oldToNew.get(oldLocalToFirst.lget()).first());
return;
}
}