/**
 * Run `fn` over `items` with at most `limit` concurrent calls.
 * Results are returned in input order. No external dependency — a small
 * worker-pool over a shared cursor keeps the Trello adapter within its
 * size-limit budget.
 */
export declare function mapWithConcurrency<T, R>(items: readonly T[], limit: number, fn: (item: T, index: number) => Promise<R>): Promise<R[]>;
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