private void updatePorts(IFigure fig) {
Vertex vertex = (Vertex) getModel();
VertexFigure figure = (VertexFigure) fig;
Graph parent = vertex.getParent();
figure.resetPorts();
for (Edge edge : parent.incomingEdgesOf(vertex)) {
String port = (String) edge
.getValue(ObjectType.PARAMETER_TARGET_PORT);
figure.addInputPort(port);