@Override
  public void onDataItemsModified(final List<DataItem> dataItems) {
    subscriptionModel.onDataItemsModified(dataItems);
  }
Transfer {@link Tablet} into eventNodes and post it on the eventBus, so that they will be heard
at the subscribers. Notice that an eventNode is reused to reduce object creation costs.

@param tablet the tablet to send
@throws UaException if failed to create {@link Event}
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/connector/protocol/opcua/OpcUaNameSpace.java