compElem.setModelElement(comp);
compElem.addNodeChangeListener(this);
elementPrototypes.put(ElementType.COMPONENT, compElem);
// Add class prototype
UmlClass clss = (UmlClass) UmlClass.getPrototype().clone();
clss.setName("Class 1");
ClassElement classElem = (ClassElement) ClassElement.getPrototype().clone();
classElem.setModelElement(clss);
classElem.addNodeChangeListener(this);
elementPrototypes.put(ElementType.CLASS, classElem);
return elementPrototypes;