/**
 * Value object representing a ticket identifier in KEY-NUMBER format.
 */
export declare class TicketId {
    private readonly KEY;
    private readonly NUMBER;
    private constructor();
    /**
     * Try to create TicketId from raw string.
     * @param {string} value - Raw ticket id value.
     * @returns {TicketId | undefined} TicketId when format is valid.
     */
    static tryCreate(value: string): TicketId | undefined;
    /**
     * Compare two ticket identifiers.
     * @param {TicketId} other - Ticket id to compare with.
     * @returns {boolean} True when both ids are equal.
     */
    equals(other: TicketId): boolean;
    /**
     * Get ticket key part.
     * @returns {string} Alphabetic key.
     */
    getKey(): string;
    /**
     * Get ticket numeric part.
     * @returns {string} Numeric part.
     */
    getNumber(): string;
    /**
     * Format ticket id as string.
     * @returns {string} Ticket id in KEY-NUMBER format.
     */
    toString(): string;
}