import { Context } from 'egg';
export declare type SliceHandler<T, U> = (d: T[]) => U | Promise<U>;
export interface SliceMapperOptions {
    sleep?: number;
    cancelKey?: string;
    logError?: boolean;
}
export declare const sliceRunner: <T = any, U = any>(ctx: Context, taskName: string, dataSource: T[], fn: SliceHandler<T, U>, partitionCount: number, opts?: SliceMapperOptions) => Promise<U[]>;