import type { BaseWorkerData } from './transformMultiThreaded.model.js';
export interface WorkerClassInterface<IN, OUT, WORKER_DATA extends BaseWorkerData = BaseWorkerData> {
    WorkerClass: BaseWorkerClass<IN, OUT, WORKER_DATA>;
}
/**
 * Class to be extended, to be used with `transformMultiThreaded`
 */
export declare abstract class BaseWorkerClass<IN, OUT, WORKER_DATA extends BaseWorkerData = BaseWorkerData> {
    workerData: WORKER_DATA;
    constructor(workerData: WORKER_DATA);
    abstract process(msg: IN, index: number): Promise<OUT>;
}