/// <reference types="node" />
import { Transform } from "stream";
import { NodeCallback, StreamFile, TransformFunction } from "./common";
/**
 * The transformed contents of a File object in streaming mode.
 */
export declare class FileContentStream extends Transform {
    private readonly transform;
    private readonly file;
    private chunks;
    constructor(transform: TransformFunction, file: StreamFile);
    _transform(chunk: Buffer, _encoding: string, next: NodeCallback<Buffer>): void;
    _flush(done: NodeCallback<Buffer>): void;
    private transformContents(contents, done);
}