streamInput = splitter.getIOField ("streamInput", 0); ASSERT (streamInput != null);
input = splitter.getIOField ("input", 0); ASSERT (input != null);
    public void connectGraph ()    {        // setup all children of this splitjoin        {            ListIterator iter;            iter = childrenStreams.listIterator ();            while (iter.hasNext ())            {                Stream s = (Stream) iter.next ();                ASSERT (s != null);                s.setupOperator ();            }        }        // connect the SplitJoin with the Split and the Join        if (splitter != null)        {            splitter.setupOperator ();            streamInput = splitter.getIOField ("streamInput", 0);            ASSERT (streamInput != null);        }        if (joiner != null)        {            joiner.setupOperator ();            streamOutput = joiner.getIOField ("streamOutput", 0);            ASSERT (streamOutput != null);        }    }