export interface UseLastChangedOptions {
    /**
     * The initial value of the last updated timestamp.
     *
     * @defaultValue null
     */
    initialValue?: number | null;
    /**
     * If `true`, deep compares the source object.
     *
     * @defaultValue false
     */
    deep?: boolean;
}
/**
 * A React Hook that record the last updated time of a state.
 */
export declare function useLastUpdated<T = unknown>(source: T, options?: UseLastChangedOptions): number | null;