private static void addSplitAndTrimmed(Collection<String> collection, @Nullable String commaSeparatedList) {
    if (commaSeparatedList != null) {
      for (String s : StringUtil.split(commaSeparatedList, ",")) {
        collection.add(s.trim());
      }
    }
  }
private static void addSplitAndTrimmed(Collection<String> collection, @Nullable String commaSeparatedList)