code: public void transform(
                      final InputStream is,
                      final OutputStream os
                      )
      {
          transform( new StreamSource( is ), new StreamResult( os ) );
      }
docs: Transforms the source XML to the result.
  If no stylesheet was specified, the result is
  identical with the source.
  
  @param   is
  the stream which the source XML is read from.
  @param   os
  the stream which the transformed result is write to.
  @throws  XmlException
  if the transformation fails.