fp2b.connect("in", "op2").connect("op2", "out");
FlowGraphGenerator fp1 = new FlowGraphGenerator();
fp1.defineInput("in");
fp1.defineFlowPart("fp2a", fp2a.toGraph());
fp1.defineFlowPart("fp2b", fp2b.toGraph());
fp1.defineOutput("out");
fp1.connect("in", "fp2a").connect("fp2a", "fp2b").connect("fp2b", "out");
gen.defineInput("in");
gen.defineFlowPart("fp1", fp1.toGraph());