docs: public static void transformMessage(Reader reader, Writer stringWriter, Reader readerxsl)
      {
          try {
              StreamSource source = new StreamSource(reader);
  
              Result result = new StreamResult(stringWriter);
  
              TransformerFactory tFact = TransformerFactory.newInstance();
              StreamSource streamTransformer = new StreamSource(readerxsl);
              
              Transformer transformer = tFact.newTransformer(streamTransformer);
  
              transformer.transform(source, result);
          } catch (TransformerConfigurationException ex)    {
              ex.printStackTrace();
          } catch (TransformerException ex) {
              ex.printStackTrace();
          }                    
      }