/**
 * @private
 */
export type AnyUpdater = (prev: any) => any;
/**
 * Type-safe updater that can be either a function or direct value
 */
export type Updater<T> = ((prev: T) => T) | T;
/**
 * @private
 */
export interface ListenerValue<T> {
    prevVal: T;
    currentVal: T;
}
/**
 * @private
 */
export type Listener<T> = (value: ListenerValue<T>) => void;
/**
 * Type guard to check if updater is a function
 */
export declare function isUpdaterFunction<T>(updater: Updater<T>): updater is (prev: T) => T;