@Override
    public List<String> getAttributeValues() {
        if (attributeValuesCache == null) {
            attributeValuesCache = Arrays.asList(rdn.getAttributeValues());
        }
        return attributeValuesCache;
    }
@author Marc Savy {@literal <msavy@redhat.com>}
gateway/engine/core/src/main/java/io/apiman/gateway/engine/impl/DefaultLdapRdn.java