anchor.diff:    } else {
       _uncaughtErrorMessage = "$msg: $trace";
     }
  -}
  -
  -/**
  - * Runs [callback] at the end of the event loop. Note that we don't wrap
  - * the callback in guardAsync; this is for test framework functions which
  - * should not be throwing unexpected exceptions that end up failing test
  - * cases! Furthermore, we need the final exception to be thrown but not
  - * caught by the test framework if any test cases failed. However, tests
  - * that make use of a similar defer function *should* wrap the callback
  - * (as we do in unitttest_test.dart).
  - */
  -_defer(void callback()) {
  -  (new Future.value()).then((_) => callback());
   }
   
   void rerunTests() {
  
positive.code: 
    _config.onStart();
  
    _defer(() {
      _nextBatch();
    });
  }
  
negative.code:   if (configAutoStart && _config.autoStart) {
      // Immediately queue the suite up. It will run after a timeout (i.e. after
      // main() has returned).
      runAsync(runTests);
    }
  }
  
  