import type { Readable } from 'node:stream';
export { LineSplitter } from "./LineSplitter.js";
export declare class ReadNextLine {
    private reader;
    private done;
    constructor(stream: ReadableStream<Uint8Array> | Readable);
    /**
     * Reads the next line from the stream.
     * If there are no more lines and the stream is done, returns null.
     */
    readLine(): Promise<string | null>;
    /**
     * Release the lock on the internal reader
     */
    release(): void;
}