/// <reference types="node" />
import * as stream from "stream";
export declare class SplitTransform extends stream.Duplex {
    private separator;
    private buffer;
    private flushing;
    constructor(separator?: RegExp);
    _write(chunk: any, encoding: string, callback: (error?: Error | null) => void): void;
    _final(callback: (error?: Error | null) => void): void;
    _read(size: number): void;
    _destroy(destroyError: Error | null, callback: (error: Error | null) => void): void;
    private flushBuffer;
    private nextPart;
}