import { Ref, RefCallback } from 'react';
/**
 * Custom hook for merging multiple React refs into a single callback ref.
 * @see https://floating-ui.com/docs/react-utils#usemergerefs
 *
 * Features:
 * - Merges an array of refs into a single callback ref
 * - Handles both function refs and object refs
 * - Optimized with useMemo for performance
 * - Returns null when all refs are null/undefined
 * - Supports generic types for type safety
 * - Automatically handles ref assignment and cleanup
 *
 * @param refs - Array of React refs to merge
 * @returns Single callback ref that handles all provided refs, or null if all refs are null
 */
export declare function useMergeRefs<Instance>(refs: Array<Ref<Instance> | undefined>): RefCallback<Instance> | null;
/**
 * Merges an array of refs into a single callback ref.
 *
 * Features:
 * - Merges an array of refs into a single callback ref
 * - Handles both function refs and object refs
 *
 * @param refs - Array of React refs to merge
 * @returns
 */
export declare function mergeRefs<Instance>(refs: Array<Ref<Instance> | undefined>): RefCallback<Instance> | null;