import type { IEngineUserOption, IUploadEngine, IUploader, IUploaderFactory, IUploaderUserOption } from '../../abstraction';
export declare class UploadEngine implements IUploadEngine {
    private _option;
    private _factory;
    constructor(option: IEngineUserOption, factory?: IUploaderFactory);
    createUploader(option?: IUploaderUserOption | undefined): IUploader;
}