code: @Override
      public Map<String, Object> getParameters(
              HttpServletRequest request, HttpServletResponse response) {
          return null;
      }
docs: /* (non-Javadoc)
  @see org.apereo.portal.rendering.xslt.TransformerConfigurationSource#getParameters(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)