import * as React from "react";
import { Dispatch, SetStateAction } from "react";
export declare type SetState<T> = Dispatch<SetStateAction<T>>;
export declare type StateHook<T> = [T, SetState<T>];
export declare class StateHolder<T> {
    readonly value: T;
    readonly setValue: SetState<T>;
    constructor(value: T, setValue: SetState<T>);
    static createFromArray<T>(stateHook: StateHook<T>): StateHolder<T>;
    asArray: () => StateHook<T>;
    toString: () => string;
}
export declare type ReactRef<T> = React.MutableRefObject<T | undefined>;
export declare type ReactRefReceiverFn<T> = (it: T) => void;
/**
 * @param refObject its `current` property is value of `it`
 * @param receiverFn lambda that accepts `it`; only runs if `refObject.current` property is truthy
 * @return refObject return the refObject that is passed
 */
export declare const _withRef: <T>(refObject: ReactRef<T>, receiverFn: ReactRefReceiverFn<T>) => ReactRef<T>;
export declare function useForceUpdateFn(): () => void;
export declare const emptyArray: () => JSX.Element[];
export declare type RenderItemFn<T> = (input: T, index: number) => JSX.Element;
export declare const makeReactElementFromArray: <T>(inputsArray: T[], itemRendererFn: RenderItemFn<T>) => JSX.Element;