/**
 * Start tracking INP webvital events.
 */
export declare function startTrackingINP(): () => void;
/**
 * Register a listener to cache route information for INP interactions.
 * TODO(v9): `latestRoute` no longer needs to be passed in and will be removed in v9.
 */
export declare function registerInpInteractionListener(_latestRoute?: unknown): void;
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