anchor.diff:    }
   
     Future<List<SocketStatistic>> _refreshSockets() async {
  +    assert(serviceManager.service != null);
  +    if (serviceManager.service == null) return [];
  +
       final sockets = <SocketStatistic>[];
       await serviceManager.service.forEachIsolate((isolate) async {
         final socketProfile =
  
positive.code:   /// If at least one isolate is already logging, this method will enable logging
    /// on all isolates and enable recording for [NetworkScreen].
    Future<bool> initializeRecordingState() async {
      // TODO(jacobr): this method does not properly handle isolates that are
      // restarted.
      // TODO(kenz): should we be checking if socket profiling has started? There is
  
negative.code: 
    /// Enables or disables Socket profiling for all isolates.
    Future<void> toggleSocketProfiling(bool state) async {
      assert(serviceManager.service != null);
      if (serviceManager.service == null) return;
  
      await serviceManager.service.forEachIsolate((isolate) async {
        final socketProfilingAvailable =
            await serviceManager.service.isSocketProfilingAvailable(isolate.id);
  