code example is not correct in Intersection Types section

**Code** ```ts function extend<First, Second>(first: First, second: Second): First & Second { const result: Partial<First & Second> = {}; for (const prop in first) { if (first.hasOwnProperty(prop)) { (result as First)[prop] = first[prop]; } } for (const prop in second) { if (second.hasOwnProperty(prop)) { (result as Second)[prop] = second[prop]; } } return result as First & Second; } class Person { constructor(public name: string) { } } interface Loggable { log(name: string): void; } class ConsoleLogger implements Loggable { log(name) { console.log(`Hello, I'm ${name}.`); } } const jim = extend(new Person('Jim'), ConsoleLogger.prototype); jim.log(jim.name); ``` class methods are non-enumerable, so the second for...in loop will not add log method to the result obj.