/**
 * Process items in batches with limited concurrency
 *
 * @param items - Array of items to process
 * @param processor - Async function to process each item
 * @param batchSize - Maximum concurrent operations (default: 20)
 * @returns Array of successfully processed results
 */
export declare function batchProcess<T, R>(items: T[], processor: (item: T) => Promise<R>, batchSize?: number): Promise<R[]>;