abstract sclass AbstractLayoutManager implements LayoutManager {
  Dimension preferredSize = new Dimension(100, 100);

  public void addLayoutComponent(String name, Component comp) {}
  public void removeLayoutComponent(Component comp) {}
  
  public Dimension preferredLayoutSize(Container parent) {
    layoutContainer(parent);
    print("preferredSize: " + preferredSize + " (parent size: " + jGetSize(parent) + ")");
    ret preferredSize;
  }
  
  public Dimension minimumLayoutSize(Container parent) {
    print("minimumLayoutSize");
    ret new Dimension(10, 10);
  }
}