code: private final void renderContentTemplate(final ST contentTemplate, final Writer writer, final Map<String, Object> values/*, final String language*/, final ErrorBuffer error) {
          injectTemplateValues(contentTemplate, values);
  //        if (language == null)
              contentTemplate.write(createSTWriter(writer), error);
  //        else
  //            contentTemplate.write(createSTWriter(writer), new Locale(language), error);
      }
docs: Renders template directly to writer