How do i use if/else statement inside a child in flutter?

I want to use if/else statement

So that i can have MainAxisAlignment.spaceEvenly for column only if the orientation is landscape. So, it doesn't change my layout in portrait orientation.

Here's the code

class _MobileLayout extends StatelessWidget {
  const _MobileLayout({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    var orientation = MediaQuery.of(context).orientation;
    return Container(
      width: orientation == Orientation.portrait ? 250 : 100,
      decoration: BoxDecoration(
        color: Colors.white,
        boxShadow: [
          BoxShadow(
            blurRadius: 16,
            color: Colors.black12,
          )
        ],
      ),
      child: Column(
        children: AppDrawer.getDrawerOptions(),
      ),
    );
  }
}