import { type RefObject } from "react";
/**
 * Dev-only hook that periodically counts DOM nodes under a container
 * element and logs the result.
 *
 * Measurement runs inside `requestIdleCallback` (with a `setTimeout`
 * fallback for environments that don't support it) so it never blocks
 * rendering or scroll.
 *
 * @param containerRef - Ref to the DOM element whose subtree to count.
 * @param label - Identifier for the console output.
 */
export declare function useDomNodeCount(containerRef: RefObject<HTMLElement | null>, label: string): void;
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