| class A { | |
| foo() => 23; | |
| } | |
| extension B ; | |
| on A; | |
| ? { foo() => 42; bar() => 87; } | |
| extension C ; | |
| on A (){ } | |
| extension D ; | |
| on int ; | |
| Function(){ } | |
| ? { int call() => 76; } | |
| main() { } | |
| testA(A? a) { } | |
| testFunction(int Function()? f) { } | |
| expect(expected, actual) { } |