abstract class A {
  B get b;
  int get i;
}

abstract class B {
  C get c;
  int get i;
}

abstract class C {
  int get i;
}

ifCase(o) {}

switchExpression(o) => switch (o) {
      A a => a,
      A(:var b) => b,
      A(b: B(:var c)) => c,
      A(b: B(c: C(:var i))) => i,
      A(:var b, :var i) => '$b$i',
      A(i: 5, :var b) => b,
      A(:var b, i: 5) => b,
      A(:var b, i: 5) && A(b: B(:var c, i: 7)) => '$b$c',
      _ => null,
    };

switchStatement(o) {}