public void serializeTriggerTable(OutputStream outputStream) throws IOException {
    ReadWriteIOUtils.write(triggerTable.size(), outputStream);
    for (TriggerInformation triggerInformation : triggerTable.values()) {
      ReadWriteIOUtils.write(triggerInformation.serialize(), outputStream);
    }
  }
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