import { HTMLAttributes, Ref } from 'react';
export declare type Nullable<T> = T | null | undefined;
export declare type WithRef<E extends HTMLAttributes<T>, T> = E & {
    ref?: Ref<T>;
};
export declare type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;
export declare type RecursiveRequired<T> = {
    [P in keyof T]-?: T[P] extends object | undefined ? Exclude<RecursiveRequired<T[P]>, undefined> : T[P];
};