int containerHeight = containerGa.getHeight();
Iterator<Shape> iterator = containerShape.getChildren().iterator();
while (iterator.hasNext()) {
Shape shape = iterator.next();
GraphicsAlgorithm ga = shape.getGraphicsAlgorithm();
IDimension size = gaService.calculateSize(ga);
if (containerHeight != size.getHeight()) {
if (ga instanceof Polyline) {
Polyline line = (Polyline) ga;
Point firstPoint = line.getPoints().get(0);
Point newPoint = gaService.createPoint(firstPoint.getX(), containerHeight);