GuidedDecisionTableGridHighlightHelper { Double getWidth(final List<GridColumn<?>> columns, final int index) { if (index < columns.size()) { return columns.get(index).getWidth(); } return 0d; }    }
@Test public void testGetWidth() { final Double expectedWidth = 0d; final Double actualWidth = helper.getWidth(new ArrayList<>(), 1); assertEquals(expectedWidth, actualWidth); }