code: public static Tuple newInstance(int arity) {
  		switch (arity) {
  			case 0: return Tuple0.INSTANCE;
  			case 1: return new Tuple1();
  			case 2: return new Tuple2();
  			case 3: return new Tuple3();
  			case 4: return new Tuple4();
  			case 5: return new Tuple5();
  			case 6: return new Tuple6();
  			case 7: return new Tuple7();
  			case 8: return new Tuple8();
  			case 9: return new Tuple9();
  			case 10: return new Tuple10();
  			case 11: return new Tuple11();
  			case 12: return new Tuple12();
  			case 13: return new Tuple13();
  			case 14: return new Tuple14();
  			case 15: return new Tuple15();
  			case 16: return new Tuple16();
  			case 17: return new Tuple17();
  			case 18: return new Tuple18();
  			case 19: return new Tuple19();
  			case 20: return new Tuple20();
  			case 21: return new Tuple21();
  			case 22: return new Tuple22();
  			case 23: return new Tuple23();
  			case 24: return new Tuple24();
  			case 25: return new Tuple25();
  			default: throw new IllegalArgumentException("The tuple arity must be in [0, " + MAX_ARITY + "].");
  		}
  	}
docs: GENERATED FROM org.apache.flink.api.java.tuple.TupleGenerator.