pkg/front_end/testcases/nnbd/function_types.dart.textual_outline.expect

typedef F = void Function();

void foo() {}

F bar() => foo;

F? baz() => foo;

void Function() hest() => foo;

void Function()? fisk() => foo;

Function()? foobar(Function()? x) => null;

class A<T> {}

class B extends A<Function()?> {
  Function()? method(Function()? x) => null;
}

main() {}