/** Shared limits across batches and callers; queued cancellation never consumes a permit. */
export declare class DataScheduler {
    private readonly totalLimit;
    private readonly resourceLimit;
    private readonly running;
    private readonly queue;
    private active;
    constructor(totalLimit?: number, resourceLimit?: number);
    run<T>(key: string, signal: AbortSignal | undefined, task: () => Promise<T>): Promise<T>;
    private drain;
}
export declare const dataScheduler: DataScheduler;