code: protected void addOverview(Content body) throws IOException {
          HtmlTree div = new HtmlTree(HtmlTag.DIV);
          div.addStyle(HtmlStyle.contentContainer);
          addOverviewComment(div);
          addTagsInfo(root, div);
          if (configuration.allowTag(HtmlTag.MAIN)) {
              htmlTree.addContent(div);
              body.addContent(htmlTree);
          } else {
              body.addContent(div);
          }
      }
docs: Adds the tag information as provided in the file specified by the
  "-overview" option on the command line.
  
  @param body the documentation tree to which the overview will be added