Use words please.

runtime/observatory/tests/service/debugger_inspect_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // VMOptions=--compile-all --error_on_bad_type --error_on_bad_override
 
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 import 'dart:async';
 import 'dart:developer';
@@ skipping 16 matching lines @@
     print(event);
     if (event.eventType == ServiceEvent.kInspect) {
       expect((event.inspectee as Instance).clazz.name, equals('Point'));
 
       subscription.cancel();
       completer.complete();
     }
   });
 
   // Start listening for events first.
-  await isolate.eval(isolate.rootLib, 'testeeDo();');
+  await isolate.rootLibrary.evaluate('testeeDo();');
   return completer.future;
 },
 
 ];
 
 main(args) => runIsolateTests(args, tests);