Dart, using static variable with await/future

I’m new to dart and wanted create a class that has a static variable but to be initialized with a value. No idea how to do it.

Something like this:

static Directory appDocDir = await getApplicationDocumentsDirectory();
static String appDocPath = appDocDir.path;

>Solution :

You can create a separate method initialize it And I am making nullable,

class Foo {
  static Directory? appDocDir;
  static String? appDocPath;

  static Future<void> init() async {
    final value = await getApplicationDocumentsDirectory();
    appDocDir = value;
    appDocPath = appDocDir?.path;
  }
}