code: protected Content getClassName(Content classStr) {
          Content caption = getTableCaption(classStr);
          Content table = (configuration.isOutputHtml5())
                  ? HtmlTree.TABLE(HtmlStyle.constantsSummary, caption)
                  : HtmlTree.TABLE(HtmlStyle.constantsSummary, constantsTableSummary, caption);
          table.addContent(getSummaryTableHeader(constantsTableHeader, "col"));
          return table;
      }
docs: Get the class name in the table caption and the table header.
  
  @param classStr the class name to print.
  @return the table caption and header