import { RefCallback, MutableRefObject, ForwardedRef } from 'react';
/**
 * Merge multiple refs into a single ref callback
 */
export declare function mergeRefs<T>(...refs: (ForwardedRef<T> | undefined)[]): RefCallback<T>;
/**
 * Merge physics ref with forwarded ref
 */
export declare function mergePhysicsRef<T>(forwardedRef: ForwardedRef<T>, physicsRef: MutableRefObject<T | null>): RefCallback<T>;
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