class Guest implements Serializable {

    @XmlTransient
    @Transient
    public LocalDateTime getLastUpdate() {
        if (null == lastUpdateTimestamp) {
            return null;
        }
        return LocalDateTime.from(lastUpdateTimestamp.toInstant().atZone(of(UTC.getId())));
    }

    public  Guest();
    public  Guest(@NotNull String publicId, @NotNull String name, String email);

}