new PredictFusion();
    public static SIRStream fusePipelinesOfStatelessStreams(SIRStream str) {        // first eliminate wrapper pipelines, as they obscure        // continuous pipeline sections        Lifter.lift(str);        PipelineFuser fuser = new PipelineFuser(FUSE_PIPELINES_OF_STATELESS_STREAMS);        SIRStream result = (SIRStream)str.accept(fuser);        //fuser.predictFusion.debugPrint();        return result;    }