code: @Override
      public void exportCommandLine(final StringBuilder out)
      {
          if (isParsed())
              if (keychar != null && keychar != ' ')
              {
                  out.append("-");
                  out.append(keychar.charValue());
              } else if (keyword != null && keyword.trim().length() > 0)
              {
                  out.append("--");
                  out.append(keyword);
              }
      }
docs: {@inheritDoc}