code: private static Templates initTemplates() {
  		try {
  			URL xsltURL = ThemeUtil.class.getResource(RESOURCE_NAME);
  			if (xsltURL != null) {
  				Source xsltSource = new StreamSource(xsltURL.openStream(), xsltURL.toExternalForm());
  				TransformerFactory factory = new net.sf.saxon.TransformerFactoryImpl();
  				Templates templates = factory.newTemplates(xsltSource);
  				LOG.debug("Generated XSLT templates for: " + RESOURCE_NAME);
  				return templates;
  			} else {
  				// Server-side XSLT enabled but theme resource not on classpath.
  				throw new IllegalStateException(RESOURCE_NAME + " not on classpath");
  			}
  		} catch (IOException | TransformerConfigurationException ex) {
  			throw new SystemException("Could not create transformer for " + RESOURCE_NAME, ex);
  		}
  	}
docs: Statically initialize the XSLT templates that are cached for all future transforms.
  
  @return the XSLT Templates.