/**
 * Process items in limited-size concurrent batches.
 *
 * @param items - The array of items to process.
 * @param batchSize - The maximum number of concurrent executions.
 * @param handler - An async function to process each item.
 * @returns A flattened array of results.
 */
declare const processInBatches: <T, R>(items: T[], batchSize: number, handler: (item: T) => Promise<R>) => Promise<R[]>;
export default processInBatches;