code: public Multimap<String, String> getValuesByLanguage(String property) {
          Multimap<String, String> result = HashMultimap.create();
          if (properties.containsKey(property)) {
              Multimap<Optional<String>, String> values = properties.get(property);
              for (Entry<Optional<String>, String> entry : values.entries())
                  if (entry.getKey().isPresent())
                      result.put(entry.getKey().get(), entry.getValue());
          }
          return result;
      }
docs: Get a collection of pairs <language,value> for the property passed by parameter
  
  @param property Property URI
  @return