Sort using an implementation of Comparator<>

StreamSortUsingComparator.java

public class SearchResultComparator implements Comparator<SearchResult> {
    @Override
    public int compare(final SearchResult o1, final SearchResult o2) {
        // TODO: address null references for getName()
        return o1.getName().compareToIgnoreCase(o2.getName());
    }
}

public class OrderingServiceImpl implements OrderingService {
    @Override
    public List<SearchResult> orderWithComparator(List<SearchResult>) {
      return results
          .stream()
          .distinct()
          .sorted(new SearchResultComparator())
          .collect(toList());
    }
}