code: private void moveToTop(List<String> keys, String propertyName) {
  
          if (keys.contains(propertyName)) {
              keys.remove(propertyName);
              keys.add(0, propertyName);
          }
      }
docs: Moves the given property name to the top of the keys if present.<p>
  
  @param keys the list of keys
  @param propertyName the property name to move