private void revalidateComponents(int yTop) {
      JComponent parent = myEditor.getContentComponent();
      for (int i = 0; i < parent.getComponentCount(); ++i) {
        Component component = parent.getComponent(i);
        if (component instanceof MyRenderer && component.getY() >= yTop) {
          component.revalidate();
        }
      }
    }
private void revalidateComponents(int yTop)