@Override
	public int getUnitIncrement() {
		return delegate.getUnitIncrement();
	}
A Vertical JScrollbar that displays an additional component to its right and sized such that
its top is just below the top button of the scrollbar and its bottom is just above the bottom
button of the scrollbar.  Useful for providing an "overview" panel.
Ghidra/Framework/Docking/src/main/java/docking/widgets/SideKickVerticalScrollbar.java