code: protected Content getNavSummaryLink(TypeElement typeElement, boolean link) {
          if (link) {
              return writer.getHyperLink(
                      SectionName.ANNOTATION_TYPE_OPTIONAL_ELEMENT_SUMMARY,
                      contents.navAnnotationTypeOptionalMember);
          } else {
              return contents.navAnnotationTypeOptionalMember;
          }
      }
docs: {@inheritDoc}