public List<TriggerInformation> getAllStatefulTriggerInformation() {
    return triggerTable.values().stream()
        .filter(TriggerInformation::isStateful)
        .collect(Collectors.toList());
  }
This Class used to save the information of Triggers and implements methods of manipulate it.
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/trigger/TriggerTable.java