group.setName("Group 1");
group.setHighSpectrumColor("red");
group.setLowSpectrumColor("yellow");
group.setType("group");
VisualGroupElementNode soma = new VisualGroupElementNode("soma");
soma.setDefaultColor("orange");
PhysicalQuantity quantity = new PhysicalQuantity();
quantity.setScalingFactor("ms");
quantity.setValue(new DoubleValue(12));
soma.setParameter(quantity);
VisualGroupElementNode synapse = new VisualGroupElementNode("synapse");
synapse.setDefaultColor("orange");
PhysicalQuantity quantity2 = new PhysicalQuantity();
quantity2.setScalingFactor("ms");
quantity2.setValue(new DoubleValue(12));
synapse.setParameter(quantity2);
group.getVisualGroupElements().add(soma);
group.getVisualGroupElements().add(synapse);
visualization.addChild(group);