code: @Override
      public Date[] purgeDatastream(Context context,
                                    String pid,
                                    String datastreamID,
                                    Date startDT,
                                    Date endDT,
                                    String logMessage) throws ServerException {
          return mgmt.purgeDatastream(context,
                                      pid,
                                      datastreamID,
                                      startDT,
                                      endDT,
                                      logMessage);
      }
docs: {@inheritDoc}