import { Component, RefObject } from 'js-widgets';
export { classes, createRef, createRefFor };
declare function createRef<T>(value?: T): {
    current: T | null;
};
declare function createRefFor<T extends object>(component: Component<{
    $ref: RefObject<T>;
}>): RefObject<T>;
declare function classes(...args: (undefined | null | false | string | (undefined | null | false | string)[] | Record<string, boolean>)[]): string;