/// <reference types="node" />
import { Transform, TransformCallback, TransformOptions } from 'stream';
import { Field } from '../interfaces';
export interface AppentDefaultTransformOptions extends TransformOptions {
    fields: Field[];
}
export declare class AppendDefaultTransform extends Transform {
    private opts;
    private vb;
    constructor(opts?: AppentDefaultTransformOptions);
    _transform(chunk: Buffer, encoding: string, callback: TransformCallback): void;
    _flush(callback: TransformCallback): void;
}