streamit.scheduler.base.StreamInterface child;
streamit.scheduler2.base.StreamInterface child;
    protected StreamInterface getHierarchicalChild(int nChild)    {        streamit.scheduler.base.StreamInterface child;        child = getChild(nChild);        if (!(child instanceof StreamInterface))        {            ERROR("This splitjoin contains a child that is not hierarchical");        }        return (StreamInterface) child;    }