public List getAliases(String domainName) { if (StringUtils.isBlank(m_extension)) { return Collections.EMPTY_LIST;
public Set getAliases() { if (m_aliases == null) {    m_aliases = new LinkedHashSet(0);
    public List getAliases(String domainName) {        if (StringUtils.isBlank(m_extension)) {            return Collections.EMPTY_LIST;        }        final String identity = AliasMapping.createUri(m_extension, domainName);        final String contact = getUri(domainName);        AliasMapping mapping = new AliasMapping(identity, contact);        return Collections.singletonList(mapping);    }