code: public Content getConstantMembersHeader(ClassDoc cd) {
          //generate links backward only to public classes.
          Content classlink = (cd.isPublic() || cd.isProtected()) ?
              getLink(new LinkInfoImpl(configuration,
                      LinkInfoImpl.Kind.CONSTANT_SUMMARY, cd)) :
              new StringContent(cd.qualifiedName());
          String name = cd.containingPackage().name();
          if (name.length() > 0) {
              Content cb = new ContentBuilder();
              cb.addContent(name);
              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 cd classdoc to be documented
  @return constant members header content