/**
 * Hook that returns a ref and a boolean indicating if the container
 * has a width >= the specified breakpoint.
 *
 * Useful for synchronizing React state with CSS container queries.
 *
 * Uses content-box measurements to match CSS container query behavior
 * (excludes padding and border).
 *
 * @param breakpoint - Minimum width in pixels
 * @returns [ref, isAboveBreakpoint] tuple
 */
export declare function useContainerSize(breakpoint: number): [React.RefObject<HTMLDivElement>, boolean];
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