code: @Override
      public String getIndexName() {
          final Name name = nameRenderer.getGedObject();
          if (!name.isSet()) {
              return " <span class=\"surname\">?</span>";
          }
  
          final String prefix = escapeString(name.getPrefix());
          final String surname = escapeString(name.getSurname());
          final String suffix = escapeString(name.getSuffix());
  
          return " " + separate(
                  wrap("<span class=\"surname\">", surname, "</span>"),
                  prefix, suffix);
      }
docs: {@inheritDoc}