export declare const to_query: (params: Record<string, string | number | undefined>) => string;
export declare function fetch_zipped<T>(url: string, { unzip }?: {
    unzip?: boolean | undefined;
}): Promise<T | null>;
export type DownloadData = string | Blob | ArrayBuffer | ArrayBufferView<ArrayBuffer>;
export declare function download(data: DownloadData, filename: string, type: string): void;