code: protected Content getFrameDetails() {
          HtmlTree leftContainerDiv = new HtmlTree(HtmlTag.DIV);
          HtmlTree rightContainerDiv = new HtmlTree(HtmlTag.DIV);
          leftContainerDiv.addStyle(HtmlStyle.leftContainer);
          rightContainerDiv.addStyle(HtmlStyle.rightContainer);
          if (noOfPackages <= 1) {
              addAllClassesFrameTag(leftContainerDiv);
          } else if (noOfPackages > 1) {
              addAllPackagesFrameTag(leftContainerDiv);
              addAllClassesFrameTag(leftContainerDiv);
          }
          addClassFrameTag(rightContainerDiv);
          HtmlTree mainContainer = HtmlTree.DIV(HtmlStyle.mainContainer, leftContainerDiv);
          mainContainer.addContent(rightContainerDiv);
          return mainContainer;
      }
docs: Get the frame sizes and their contents.
  
  @return a content tree for the frame details