Find most frequent item in collection

MostFrequentItem.java

  private <V> V findMostFrequentItem(final Collection<V> items)
  {
    return items.stream()
        .filter(Objects::nonNull)
        .collect(Collectors.groupingBy(Functions.identity(), Collectors.counting())).entrySet().stream()
        .max(Comparator.comparing(Entry::getValue))
        .map(Entry::getKey)
        .orElse(null);
  }