docs: public static String[] splitContentValues(String[] strings) {
          final Set<String> result = new LinkedHashSet<String>();
  
          for (String string : strings) {
              if (string.isEmpty())
                  continue;
              String[] splitted = string.trim().split(",");
              for (String string2 : splitted) {
                  result.add(string2);
              }
          }
          return result.toArray(new String[result.size()]);
      }