interface ProxyHandler { apply?(target: T, thisArg: any, argArray: any[]): any; construct?(target: T, argArray: any[], newTarget: Function): object; defineProperty?(target: T, p: string | symbol, attributes: PropertyDescriptor): boolean; deleteProperty?(target: T, p: string | symbol): boolean; get?(target: T, p: string | symbol, receiver: any): any; getOwnPropertyDescriptor?(target: T, p: string | symbol): PropertyDescriptor | undefined; getPrototypeOf?(target: T): object | null; has?(target: T, p: string | symbol): boolean; isExtensible?(target: T): boolean; ownKeys?(target: T): ArrayLike; preventExtensions?(target: T): boolean; set?(target: T, p: string | symbol, value: any, receiver: any): boolean; setPrototypeOf?(target: T, v: object | null): boolean; } interface ProxyConstructor { revocable(target: T, handler: ProxyHandler): { proxy: T; revoke: () => void; }; new (target: T, handler: ProxyHandler): T; } declare var Proxy: ProxyConstructor;