Modifies the value returned by
agent.balance. Allows agents’ money balances to be filtered, e.g. if they hold money in a form other than the registered money good that ought to be counted toward total balances.
agent — Agent
The agent whose balance is being checked.
balance — num
The agent's holdings of the registered monetary good.
model — Helipad
The model object.
Expected Return Value — num
The money balance to be reported for the agent.