anchor.diff:  
   import 'package:drails_di/drails_di.dart';
   import 'package:unittest/unittest.dart';
  -import 'dart:mirrors';
   
   main() {
     group('AopProxy Test ->', () {
  
positive.code: 
  var afterCounter = 0;
  
  @After(SomeService_sayHello)
  increaseAfterCounter(retVal) {
    afterCounter++;
    print("after sayHello $afterCounter");
  
negative.code: 
  var beforeCounter = 0;
  
  bool SomeService_sayHello(component, Invocation inv) =>
      component is SomeService
      && inv.memberName == #sayHello;
  
  @Before(SomeService_sayHello)
  