docs: public Transformer getTransformer(HttpServletRequest req, ServletTask servletTask, ScreenModel screen)
              throws ServletException, IOException
      {
          String stylesheet = null;
          if (stylesheet == null)
              stylesheet = req.getParameter(DBParams.TEMPLATE);
          if (stylesheet == null)
              if (screen != null)
                  if (screen.getScreenFieldView() != null)
                      stylesheet = screen.getScreenFieldView().getStylesheetPath();
          if (stylesheet == null)
              stylesheet = req.getParameter("stylesheet");
          if (stylesheet == null)
              stylesheet = "org/jbundle/res/docs/styles/xsl/flat/base/menus";
          
          try {
              if (hmTransformers.get(stylesheet) != null)
                  return hmTransformers.get(stylesheet);
              String stylesheetFixed = BaseServlet.fixStylesheetPath(stylesheet, screen, true);
              
              InputStream stylesheetStream = this.getFileStream(servletTask, stylesheetFixed, null);
              if (stylesheetStream == null)
              {
                  stylesheetFixed = BaseServlet.fixStylesheetPath(stylesheet, screen, false);  // Try it without browser mod
                  stylesheetStream = this.getFileStream(servletTask, stylesheetFixed, null);
              }
              if (stylesheetStream == null)
                  Utility.getLogger().warning("XmlFile not found " + stylesheetFixed);   // TODO - Display an error here
              StreamSource stylesheetSource = new StreamSource(stylesheetStream);
              
              if (tFact == null)
                  tFact = TransformerFactory.newInstance();
              URIResolver resolver = new MyURIResolver(servletTask, stylesheetFixed);
              tFact.setURIResolver(resolver);
              Transformer transformer = tFact.newTransformer(stylesheetSource);
              //transformer.setOutputProperty(OutputKeys.INDENT, "yes");
              //transformer.setOutputProperty(OutputKeys.METHOD, "xml");
              hmTransformers.put(stylesheet, transformer);
              return transformer;
          } catch (TransformerConfigurationException ex)    {
              ex.printStackTrace();
          }
          return null;
      }