/**
 * React utility to merge refs.
 *
 * When developing low level UI components, it is common to have to use a local
 * ref but also support an external one using React.forwardRef. Natively, React
 * does not offer a way to set two refs inside the ref property.
 *
 * @param Array of refs (object, function, etc.)
 *
 * @example
 *
 * const Example = React.forwardRef(function Example(props, ref) {
 *   const localRef = React.useRef();
 *   const mergedRefs = useMergeRefs([localRef, ref]);
 *
 *   return <div ref={mergedRefs} />;
 * });
 *
 */
export declare function useMergeRefs<T = any>(refs: Array<React.MutableRefObject<T> | React.LegacyRef<T> | undefined | null>): React.RefCallback<T>;