import React from "react";
import { UnsubscribeFn } from "./types";
/**
 * Similar to constructing a subscription to a value using `useClearedMemo`, but this also allows for making
 * sure that the most recently notified value is equal to the current value when constructing the subscription.
 * This solves the problem that `useClearedMemo` may call the getter function inside an effect.
 */
export declare function useClearedValueSubscription<T>(initialValue: T, getValue: () => T, onValueDiff: () => void, valueSubscriber: (listener: (value: T) => void) => UnsubscribeFn, deps?: readonly any[]): React.MutableRefObject<T>;
export declare type Falsey = void | null | false | undefined;
export declare function validateListener(listener: any): void;