@Override
  protected void serializeAttributes(ByteBuffer byteBuffer) {
    PlanNodeType.INSERT_MULTI_TABLET.serialize(byteBuffer);

    ReadWriteIOUtils.write(insertTabletNodeList.size(), byteBuffer);

    for (InsertTabletNode node : insertTabletNodeList) {
      node.subSerialize(byteBuffer);
    }
    for (Integer index : parentInsertTabletNodeIndexList) {
      ReadWriteIOUtils.write(index, byteBuffer);
    }
  }
record the result of insert tablets
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/write/InsertMultiTabletsNode.java