export declare class VoucherNumber {
    private readonly value;
    private constructor();
    static create(value: number): VoucherNumber;
    private validate;
    getValue(): number;
    toString(): string;
    toFormattedString(): string;
    equals(other: VoucherNumber): boolean;
    isGreaterThan(other: VoucherNumber): boolean;
    isLessThan(other: VoucherNumber): boolean;
    next(): VoucherNumber;
    previous(): VoucherNumber;
    clone(): VoucherNumber;
}