code: protected Content getFrameDetails() {
          HtmlTree frameset = HtmlTree.FRAMESET("20%,80%", null, "Documentation frame",
                  "top.loadFrames()");
          if (noOfPackages <= 1) {
              addAllClassesFrameTag(frameset);
          } else if (noOfPackages > 1) {
              HtmlTree leftFrameset = HtmlTree.FRAMESET(null, "30%,70%", "Left frames",
                  "top.loadFrames()");
              addAllPackagesFrameTag(leftFrameset);
              addAllClassesFrameTag(leftFrameset);
              frameset.addContent(leftFrameset);
          }
          addClassFrameTag(frameset);
          addFrameWarning(frameset);
          return frameset;
      }
docs: Get the frame sizes and their contents.
  
  @return a content tree for the frame details