/// <reference types="node" />
import DataSink from "./DataSink";
export default class FileSink implements DataSink {
    /**
     * Target file descriptor.
     */
    private fileDesc;
    /**
     * Number of written bytes.
     */
    private fileSize;
    /**
     * @param path Target file path.
     */
    constructor(path: string);
    write(buffer: Buffer): void;
    close(): void;
    size(): number;
}