private void drawDragRowInsertionMarker(Graphics gc, Row parent, int insertAtIndex) {
		Rectangle bounds = getDragRowInsertionMarkerBounds(parent, insertAtIndex);
		gc.setColor(Color.red);
		gc.drawLine(bounds.x, bounds.y + bounds.height / 2, bounds.x + bounds.width, bounds.y + bounds.height / 2);
		for (int i = 0; i < bounds.height / 2; i++) {
			gc.drawLine(bounds.x + i, bounds.y + i, bounds.x + i, bounds.y + bounds.height - (1 + i));
		}
	}