this.add(new Identity()); this.add(new Identity());
this.add(new IdentityFloat()); this.add(new IdentityFloat());
                                public void init() {                                    this.setSplitter(ROUND_ROBIN());                                    this.add(new Identity());                                    this.add(new Identity());                                    this.setJoiner(WEIGHTED_ROUND_ROBIN((int)                                                                        N/4,                                                                        (int)                                                                        N/4));                                }});