code: private static List<ConnectionNotation> getSelfCycleConnections(String id, List<ConnectionNotation> connections) {
      List<ConnectionNotation> list = new ArrayList<ConnectionNotation>();
      for (ConnectionNotation connection : connections) {
        if (connection.getSourceId().getId().equals(id)) {
          list.add(connection);
        }
      }
      return list;
    }
docs: method to get for one polymer all self-cycle ConnectionNotations
  
  @param id polymer id
  @param connections list of ConnectionNotation
  @return list of all self-cycle connections