|int||getScrollableBlockIncrement (Rectangle visibleRect, int orientation, int direction)|
|int||getScrollableUnitIncrement (Rectangle visibleRect, int orientation, int direction)|
|static final long||serialVersionUID = 1009744410018634511L|
A panel that is to be placed in a JScrollPane that can only scroll vertically. This panel should have its width track the viewport's width, and increase its height as necessary to display all components.