code: protected void addDescription(PackageElement pkg, Content dlTree, SearchIndexItem si) {
          Content link = getPackageLink(pkg, new StringContent(utils.getPackageName(pkg)));
          if (configuration.showModules) {
              si.setContainingModule(utils.getFullyQualifiedName(utils.containingModule(pkg)));
          }
          si.setLabel(utils.getPackageName(pkg));
          si.setCategory(resources.getText("doclet.Packages"));
          Content dt = HtmlTree.DT(link);
          dt.addContent(" - ");
          dt.addContent(contents.package_);
          dt.addContent(" " + utils.getPackageName(pkg));
          dlTree.addContent(dt);
          Content dd = new HtmlTree(HtmlTag.DD);
          addSummaryComment(pkg, dd);
          dlTree.addContent(dd);
      }
docs: Add one line summary comment for the package.
  
  @param pkg the package to be documented
  @param dlTree the content tree to which the description will be added
  @param si the search index item to be updated