code: public Content getConstantMembersHeader(TypeElement typeElement) {
          //generate links backward only to public classes.
          Content classlink = (utils.isPublic(typeElement) || utils.isProtected(typeElement)) ?
              getLink(new LinkInfoImpl(configuration,
                      LinkInfoImpl.Kind.CONSTANT_SUMMARY, typeElement)) :
              new StringContent(utils.getFullyQualifiedName(typeElement));
  
          PackageElement enclosingPackage  = utils.containingPackage(typeElement);
          if (!enclosingPackage.isUnnamed()) {
              Content cb = new ContentBuilder();
              cb.addContent(enclosingPackage.getQualifiedName());
              cb.addContent(".");
              cb.addContent(classlink);
              return getClassName(cb);
          } else {
              return getClassName(classlink);
          }
      }
docs: Get the table caption and header for the constant summary table
  
  @param typeElement the TypeElement to be documented
  @return constant members header content