/**
 * @author Aocheng Wang <aochengwang@microsoft.com>
 */
/**
 * Download a file from URL and save to a temporary file.
 * The temp file can only be used during callback. After that the temp file is deleted.
 *  */
export declare function downloadToTempFile(url: string, options: {
    timeout: number;
    headers?: {
        [key: string]: string;
    };
}, callback: (filePath: string) => Promise<void>): Promise<void>;
export declare function unzip(zipFilePath: string, destinationPath: string): Promise<void>;
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