builder2.addOutput("low", Ex1.class);
builder2.addOutput("stop", Ex1.class);
builder2.addParameter("parameter", int.class, parameter);
builder2.addAttribute(new OperatorHelper("selector", Arrays.asList(new Class<?>[]{List.class, Ex1.class})));
builder2.addAttribute(FlowBoundary.SHUFFLE);
FlowElementResolver resolver2 = builder2.toResolver();
resolver2.resolveInput("master", master);
resolver2.resolveInput("model", model);
this.high = resolver2.resolveOutput("high");
this.low = resolver2.resolveOutput("low");
this.stop = resolver2.resolveOutput("stop");
}