assertFalse(r1.equals(r2));
r2.setDrawBarOutline(!r2.isDrawBarOutline());
assertEquals(r1, r2);
// setGradientPaintTransformer()
r1.setGradientPaintTransformer(new StandardGradientPaintTransformer(
GradientPaintTransformType.CENTER_HORIZONTAL));
assertFalse(r1.equals(r2));
r2.setGradientPaintTransformer(new StandardGradientPaintTransformer(
GradientPaintTransformType.CENTER_HORIZONTAL));
assertEquals(r1, r2);
// positiveItemLabelFallbackPosition
r1.setPositiveItemLabelPositionFallback(new ItemLabelPosition());