import React from "react";
export declare const classNames: (...classes: Array<string>) => string;
export declare const getChildByName: (children: React.ReactNode, name: string) => (string | number | React.ReactElement<any, string | React.JSXElementConstructor<any>> | React.ReactFragment | React.ReactPortal)[];
export declare const truncate: (str: string, size?: number) => string;
export declare const useUniqueId: () => string;
export declare const letterCase: (str: string) => string;
