export declare class RandomUtils {
    private static readonly UPPER_CHARS;
    private static readonly LOWER_CHARS;
    private static readonly NUMBER_CHARS;
    static createInt(min: number, max: number): number;
    static createString(length: number): string;
    static createLetterString(length: number): string;
    static createUpperString(length: number): string;
    static createLowerString(length: number): string;
    static createNumberString(length: number): string;
    private static createRandomString;
}