code: public void buildExceptionSummary(XMLNode node, Content summaryContentTree) {
          String exceptionTableSummary =
                  configuration.getText("doclet.Member_Table_Summary",
                  configuration.getText("doclet.Exception_Summary"),
                  configuration.getText("doclet.exceptions"));
          List<String> exceptionTableHeader = Arrays.asList(configuration.getText("doclet.Exception"),
                  configuration.getText("doclet.Description"));
          Set<TypeElement> iexceptions =
              utils.isSpecified(packageElement)
                  ? utils.getTypeElementsAsSortedSet(utils.getExceptions(packageElement))
                  : configuration.typeElementCatalog.exceptions(packageElement);
          SortedSet<TypeElement> exceptions = utils.filterOutPrivateClasses(iexceptions,
                  configuration.javafx);
          if (!exceptions.isEmpty()) {
              packageWriter.addClassesSummary(exceptions,
                      configuration.getText("doclet.Exception_Summary"),
                      exceptionTableSummary, exceptionTableHeader, summaryContentTree);
          }
      }
docs: Build the summary for the exceptions in this package.
  
  @param node the XML element that specifies which components to document
  @param summaryContentTree the summary tree to which the exception summary will
  be added