/**
 * addComputed (DEPRECATED)
 *
 * @deprecated Please consider using `derive` or `proxyWithComputed` instead.
 */
export declare function addComputed_DEPRECATED<T extends object, U extends object>(proxyObject: T, computedFns_FAKE: {
    [K in keyof U]: (snap_FAKE: T) => U[K];
}, targetObject?: any): any;