code: private Pair<String, String> getNormalizedTagValuePair(
              final CommandLineArgumentParser commandLineArgumentParser,
              final String preprocessedValue) {
          final Pair<String, String> taggedSurrogatePair =
                  commandLineArgumentParser.getTaggedArgumentParser().getTaggedOptionForSurrogate(preprocessedValue);
          return taggedSurrogatePair == null ?
                  Pair.of(null, preprocessedValue) :
                  taggedSurrogatePair;
      }
docs: Get a tag/value pair for an argument value even if there its not tagged (left side will be null)