buildBackPanelLandscape method Null safety

Implementation

@override
Widget buildBackPanelLandscape(
        BuildContext context, final ScreenPositioner screen) =>
    Stack(fit: StackFit.expand, children: [
      Container(color: MainScreen.keyboardBaseColor),
      screen.box(const Rect.fromLTWH(11.8, 0.4, 0.8, 0.8),
          const Icon(Icons.arrow_back, color: Colors.white)),
      screen.box(
          const Rect.fromLTWH(0.1, 0.5, 5.03 * 0.57, 1.98 * 0.57),
          Image.asset(
              'packages/jrpn/assets/NAFO_OFAN_brain_damaged_cartoon_dogs.jpeg')),
      screen.box(const Rect.fromLTWH(1.05, 1.0, .75, 3), tryzub(1)),
      screen.box(const Rect.fromLTWH(0.2, 3.96, 1.6, 2.2), sigmaTable(1.6)),
      screen.box(const Rect.fromLTWH(1.43, 3.76, 5, 3.4), drawingTable(5)),
      ...jumpTableList(screen, 3.49, 0.7),
      screen.box(const Rect.fromLTWH(6.83, 0.7, 3.5, 2.2), metricTable(3.5)),
      screen.box(const Rect.fromLTWH(6.83, 2.40, 4, 5), numberTable(4.0))
    ]);