import type { Dispatch, SetStateAction } from 'react';
/**
 * State hook that only updates when the next value is JSON-stringifiably different.
 * @param defaultValue - Initial state value.
 * @returns A state tuple of the current value and a deep-compare setter.
 */
export declare const useDataState: <T>(defaultValue: T | undefined) => [T | undefined, Dispatch<SetStateAction<T | undefined>>];
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