import ParallelTransform from 'parallel-transform-stream';
import { Processor, ProcessorOption } from './types';
export declare class HoleTransform extends ParallelTransform {
    constructor(asyncFn: Processor<any, any>, options?: ProcessorOption);
    _parallelTransform(data: any, enc: any, callback: any): void;
    emit(...args: any[]): any;
}