export declare const downloadFile: (url: string, fileName?: string) => void;
export declare const objectToQueryStr: (obj: any) => string;
export declare const urlParamsToObject: (url: string) => any;
export declare const formatNumber: (value: number | string, precision?: number, separator?: string, decimal?: string) => string;
export declare function add(num1: number, num2: number): number;