code: public PythonDataStream close_with(PythonDataStream<? extends DataStream<PyObject>> feedback_stream) {
  		((IterativeStream<PyObject>) this.stream).closeWith(feedback_stream.stream);
  		return feedback_stream;
  	}
docs: A thin wrapper layer over {@link IterativeStream#closeWith(org.apache.flink.streaming.api.datastream.DataStream)}
  
  <p>Please note that this function works with {@link PythonDataStream} and thus wherever a DataStream is mentioned in
  the above {@link IterativeStream#closeWith(org.apache.flink.streaming.api.datastream.DataStream)} description,
  the user may regard it as {@link PythonDataStream} .
  
  @param feedback_stream {@link PythonDataStream} that will be used as input to the iteration
  head.
  @return The feedback stream.