quantity2.setValue(ValuesFactory.getDoubleValue(100d));
v.addPhysicalQuantity(quantity);
v.addPhysicalQuantity(quantity2);
ParameterNode a1 = new ParameterNode("a");
runtimeTree.addChild(entity1);
runtimeTree.addChild(entity2);
entity1.addChild(entity2);
entity2.addChild(entity3);