int east = style.getContainerGap(todrop, SwingConstants.EAST, container);
int h = container.getHeight();
int w = container.getWidth();
if (Math.abs(bx - w + insets.right) < THRESHOLD_DISTANCE) {
List<Quartet> list = new ArrayList<Quartet>();
Quartet trio = new Quartet(w - insets.right, w - insets.right, insets.top, h - insets.bottom, new VerticalTrailingContainerAnchor(container));
list.add(trio);
return list;
} else if (Math.abs(bx - w + insets.right + east) < THRESHOLD_DISTANCE) {
List<Quartet> list = new ArrayList<Quartet>();
Quartet trio = new Quartet(w - insets.right - east, w - insets.right - east, insets.top, h - insets.bottom, new VerticalTrailingGapContainerAnchor(