/** Exposed for testing only. */
export declare function _getOverpassState(): Readonly<{
    windowTimestamps: readonly number[];
    inFlight: number;
    queueLength: number;
    maxConcurrent: number;
    maxPerWindow: number;
    windowMs: number;
    requestTimeoutMs: number;
}>;
/** Exposed for testing: reset internal state between test runs. */
export declare function _resetOverpassState(): void;
export declare function fetchOverpassJson<T>(query: string): Promise<T>;