assertEquals(3, layerStack.getColumnIndexByPosition(3));
assertEquals(100, layerStack.getColumnWidthByPosition(3));
assertEquals(700, layerStack.getStartXOfColumnPosition(3));
// Hide 2
layerStack.doCommand(new ColumnHideCommand(layerStack, 2));
assertEquals(9, layerStack.getColumnCount());
assertEquals(1, layerStack.getColumnIndexByPosition(1));
assertEquals(100, layerStack.getColumnWidthByPosition(1));
assertEquals(100, layerStack.getStartXOfColumnPosition(1));