class NotificationToEmailConverterCommon {

    public Set<String> getFullyQualifiedEmailAddresses(Set<String> recipients) {
        return recipients.stream()
                .map(s -> s.replaceAll(userDomainPrefix, ""))
                .map(r -> r + AT + emailDomainTo)
                .collect(Collectors.toSet());
    }

    public  NotificationToEmailConverterCommon();

}