```javascript // BEFORE let defaultOwner = {firstName: "Martin", lastName: "Fowler"}; // AFTER let defaultOwnerData = {firstName: "Martin", lastName: "Fowler"}; export function defaultOwner() {return defaultOwnerData;} export function setDefaultOwner(arg) {defaultOwnerData = arg;} ``` Access your data through functions so that updating the variable is as simple as changing a single function rather than every instance of a variable used. variables encapsulated by functions are also testable