/**
 * Processes items in parallel batches of a given size.
 *
 * Items within each batch run concurrently via `Promise.all()`.
 * Batches execute sequentially to limit concurrency and avoid API rate limits.
 * Result order matches input order.
 *
 * @param items - Array of items to process.
 * @param batchSize - Number of items to process concurrently per batch (clamped to [1, 50]).
 * @param processor - Async function to apply to each item.
 * @returns Array of results in the same order as the input items.
 */
export declare function processInBatches<T, R>(items: T[], batchSize: number, processor: (item: T) => Promise<R>): Promise<R[]>;