/**
 * @param {number} value
 * @param {string} picture
 * @param {number} dec
 * @param {number} len
 * @param {string} decSep
 * @param {string} thousandSeparator
 * @param {boolean} sign
 * @param {boolean} errorOnBadNumber
 * @return string
 */
export declare const formatNumber: (value: string, picture: string, dec: number, len: number, decSep: string, thousandSeparator: string, sign: boolean, errorOnBadNumber: boolean) => string;