interface StringUtilsUtils {
    isEmpty(s: unknown): boolean;
    genID(): string;
    uuid(): string;
    leftPad(s: string, prefix: string, len: number): string;
    isString(s: unknown): boolean;
    isNumber(s: unknown): boolean;
    parseNumber(s: unknown, defValue?: number): number;
}
declare const StringUtils: StringUtilsUtils;
export default StringUtils;