code: private StringBuffer loadScriptTemplate() {
  		try (InputStream is = ClassLoaderResourceUtils.getResourceAsStream(SCRIPT_TEMPLATE, this);
  				StringWriter sw = new StringWriter()) {
  			IOUtils.copy(is, sw);
  			return sw.getBuffer();
  
  		} catch (IOException e) {
  			Marker fatal = MarkerFactory.getMarker("FATAL");
  			LOGGER.error(fatal, "a serious error occurred when initializing MessageBundleScriptCreator");
  			throw new BundlingProcessException(
  					"Classloading issues prevent loading the message template to be loaded. ", e);
  		}
  	}
docs: Loads a template containing the functions which convert properties into
  methods.
  
  @return the template containing the functions which convert properties
  into methods.