import type * as React from 'react';
export declare const fillRef: <T>(ref: React.Ref<T>, node: T) => void;
/**
 * Merge refs into one ref function to support ref passing.
 */
export declare const composeRef: <T>(...refs: React.Ref<T>[]) => React.Ref<T>;
export declare const useComposeRef: <T>(...refs: React.Ref<T>[]) => React.Ref<T>;