public void serializeCustomizedAttributes(
      final TimeSeriesWindow window, final DataOutputStream outputStream) {
    // Do nothing by default
  }
Serialize the customized attributes in a window to an output stream

@param window the window to serialize
@param outputStream the outputStream
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/processor/aggregate/window/processor/AbstractWindowingProcessor.java