=== tests/cases/conformance/parser/ecmascript5/parserOptionalTypeMembers1.ts ===
interface PropertyDescriptor2 {
>PropertyDescriptor2 : PropertyDescriptor2

    configurable?: boolean;
>configurable : boolean

    enumerable?: boolean;
>enumerable : boolean

    value?: any;
>value : any

    writable?: boolean;
>writable : boolean

    get?(): any;
>get : () => any

    set?(v: any): void;
>set : (v: any) => void
>v : any
}