/**
 * Hook to synchronize vertical scrolling between multiple elements.
 * It uses imperative DOM manipulation to bypass React state updates for performance.
 */
export declare const usePlannerSync: () => {
    taskListRef: import('react').RefObject<HTMLDivElement | null>;
    ganttRef: import('react').RefObject<HTMLDivElement | null>;
    hasHorizontalScroll: boolean;
    checkScroll: () => void;
};
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