NodeImpl adder = graph.getNode("Adder_add");
NodeImpl adder2 = graph.getNode("Adder_add_2");
NodeImpl multiplier = graph.getNode("Multiplier_multiply");
// Remove Adder_2 and replace with Multiplier_2.
graph.removeNode(adder2);
repaintAndWait(1);
Node multiplier2 = workflow.addNode(multiplierComponent);
multiplier2.setPosition(new Point(170, 210));
repaintAndWait(1);