/// <reference types="node" />
import { Transform } from 'stream';
import { StreamOptions } from './streamOptions';
import * as File from 'vinyl';
export declare class PboTransformStream extends Transform {
    private _contentParts;
    private _options;
    private _builder;
    constructor(options?: StreamOptions);
    _transform(file: File, enc: string, cb: Function): void;
    _flush(cb: Function): void;
    _getDefaultName(): string;
}