declare namespace _default {
    /**
     * format value as per unit
     * @method formatValue
     * @param {Number} value to covert/abbreviate
     * @param {String} unit 'percentage' | 'bytes' | 'time' | 'default'
     */
    function formatValue(value: number, unit: string): string | null | undefined;
    /**
     * Formatting number
     * @method abbreviateNumber
     * @param {Number} num to covert/abbreviate
     * @param {Number} fixed how many digits to display after decimal point
     */
    function abbreviateNumber(num: number, fixed: number): string | null;
    /**
     * Formatting Bytes
     * @method abbreviateBytes
     * @param {Number} bytes to abbreviate
     * @param {Number} decimals how many digits to display after decimal point
     */
    function abbreviateBytes(bytes: number, decimals?: number): string;
    /**
     * Formatting Time
     * @method abbreviateTime
     * @param {Number} milliseconds to abbreviate
     */
    function abbreviateTime(milliseconds: number): string | undefined;
}
export default _default;