docs: @Programmatic
      public void logoutAllSessions(final Timestamp logoutTimestamp) {
  
          final PersistenceManager pm = isisJdoSupport.getJdoPersistenceManager();
  
          final Properties properties = pm.getPersistenceManagerFactory().getProperties();
          if(isTrue(properties.get(DN_BULK_UPDATES_KEY))) {
              final javax.jdo.Query jdoQuery = pm.newNamedQuery(SessionLogEntry.class, "logoutAllActiveSessions");
  
              final Map argumentsByParameterName = ImmutableMap.of(
                      "logoutTimestamp", logoutTimestamp,
                      "causedBy2", SessionLogEntry.CausedBy2.RESTART);
              try {
                  final Long numRows = (Long) jdoQuery.executeWithMap(argumentsByParameterName);
              } finally {
                  jdoQuery.closeAll();
              }
          } else {
              final List<SessionLogEntry> activeEntries =
                      repositoryService.allMatches(new QueryDefault<>(SessionLogEntry.class, "listAllActiveSessions"));
              for (SessionLogEntry activeEntry : activeEntries) {
                  activeEntry.setCausedBy2(SessionLogEntry.CausedBy2.RESTART);
                  activeEntry.setLogoutTimestamp(logoutTimestamp);
              }
          }
      }