Colored Variables (def:var)

var SimpleAccount := class Value {

var dynamic private deposit:=200;

var dynamic private withdrawal:=100;

var getTotal := method [] return (deposit - withdrawal);

var payable := method [payment] return (payment< def:getTotal[])};

var Account := class SimpleAccount {

var dynamic private savings:= 400;

var getTotal := method [] return (super.getTotal[] + savings); };

var sa := new SimpleAccount;

print sa.payable[200]; // not payable

var a := new Account;

print a.payable[200]