/**
 * Optimistic lock exception thrown when a concurrent update conflict occurs.
 */
export default class OptimisticLockException extends Error {
    #private;
    /**
     * Constructs an OptimisticLockException.
     * @param message - Error message.
     * @param entity - Conflicting target entity object.
     */
    constructor(message: string, entity: any);
    /**
     * Retrieves the conflicting target entity object.
     * @returns Conflicting entity object.
     */
    get entity(): any;
}