code: public List<T> getObjectList(String id) {
  
          if (m_uniqueIds) {
              throw new UnsupportedOperationException("Not supported for unique ids");
          }
          return m_objectsListsById.get(id);
      }
docs: Returns the list of objects with the given id.<p>
  
  @param id the object id
  
  @return the list of objects if found, or <code>null</code>