fp4.defineOperator("op1", "in", "out");
fp4.defineOutput("out");
fp4.connect("in", "op1").connect("op1", "out");
FlowGraphGenerator fp3 = new FlowGraphGenerator();
fp3.defineInput("in");
fp3.defineFlowPart("fp4", fp4.toGraph());
fp3.defineOutput("out");
fp3.connect("in", "fp4").connect("fp4", "out");
FlowGraphGenerator fp2 = new FlowGraphGenerator();