code: public Map<TimestampMode, List<String>> getDefaultTimestampModes() {
  
          Map<TimestampMode, List<String>> result = new HashMap<TimestampMode, List<String>>();
          for (String resourcetype : m_defaultTimestampModes.keySet()) {
              TimestampMode mode = m_defaultTimestampModes.get(resourcetype);
              if (result.containsKey(mode)) {
                  result.get(mode).add(resourcetype);
              } else {
                  List<String> list = new ArrayList<String>();
                  list.add(resourcetype);
                  result.put(mode, list);
              }
          }
          return result;
      }
docs: Returns the map from resourcetype names to default timestamp modes.
  @return the map from resourcetype names to default timestamp modes.