@Override
    protected List<String> getFieldOrder() {
      return Arrays.asList(
          "hServer", "vtCanonicalDataType", "wReserved", "dwAccessRights", "dwBlobSize", "pBlob");
    }
We define the OPC DA Classes and interfaces here like C's .h file.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/connector/protocol/opcda/OpcDaHeader.java