docs: void setFeature( XMLReader reader,
                       String featureName,
                       boolean value ) {
          try {
              if (reader.getFeature(featureName) != value) {
                  reader.setFeature(featureName, value);
              }
          } catch (SAXException e) {
              getLogger().warn(e, "Cannot set feature " + featureName);
          }
      }