* Serialize an instance, restore it, and check for equality.
*/
public void testSerialization() {
CrosshairOverlay o1 = new CrosshairOverlay();
o1.addDomainCrosshair(new Crosshair(99.9));
o1.addRangeCrosshair(new Crosshair(1.23, new GradientPaint(1.0f, 2.0f,
Color.red, 3.0f, 4.0f, Color.blue), new BasicStroke(1.1f)));
CrosshairOverlay o2 = null;
try {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
ObjectOutput out = new ObjectOutputStream(buffer);