private static Map<String, String> mapAffinityLabelMapping(RegistrationAffinityLabelMappings model) { return model.getRegistrationAffinityLabelMappings() .stream() .collect(Collectors.toMap( registrationMap -> registrationMap.isSetFrom() ? registrationMap.getFrom().getName() : null, registrationMap -> registrationMap.isSetTo() ? AffinityLabelMapper.map(registrationMap.getTo(), null).getName() : null)); }