if (checkObject(oid)){ try { var = getValueFor(oid);
if (checkObject(oid)){ try { var = getValueFor(oid);
oldVar = getValueFor(oid); modified.add(new VariableBinding(oid, oldVar)); // keep a record of the old variable binding. if (checkObject(oid)){ var = setValueFor(oid,newVal);
oldVar = getValueFor(oid); modified.add(new VariableBinding(oid, oldVar)); // keep a record of the old variable binding. if (checkObject(oid)){ var = setValueFor(oid,newVal);