import { EnqueueOptions, Task } from './y-queue';
export interface YBatchOptions {
    concurrency?: number;
    maxQueueLength?: number;
}
export declare class YBatchErrors extends Error {
    readonly errors: unknown[];
    constructor(errors: unknown[]);
    toString(): string;
}
export declare class YBatch {
    readonly options: YBatchOptions;
    static isYBatchError(e: unknown): e is YBatchErrors;
    readonly maxQueueLength: number;
    private readonly queue;
    private readonly errors;
    private failFastWaits;
    private allSettledWaits;
    private running;
    constructor(options: YBatchOptions);
    add(fn: Task<void>, options?: Partial<EnqueueOptions>): Promise<void>;
    failFast(): Promise<void>;
    allSettled(): Promise<void>;
}