code: protected Content getNavSummaryLink(ClassDoc cd, boolean link) {
          if (link) {
              if (cd == null) {
                  return writer.getHyperLink(
                  SectionName.PROPERTY_SUMMARY,
                  writer.getResource("doclet.navProperty"));
              } else {
                  return writer.getHyperLink(
                  SectionName.PROPERTIES_INHERITANCE,
                  configuration.getClassName(cd), writer.getResource("doclet.navProperty"));
              }
          } else {
              return writer.getResource("doclet.navProperty");
          }
      }
docs: {@inheritDoc}