anchor.diff:      });
   
       invokeAndCatchErrors(() async {
  -      await serviceManager.serviceExtensionManager!.setServiceExtensionState(
  +      await serviceManager.serviceExtensionManager.setServiceExtensionState(
           widget.service.extension,
           enabled: value,
           value:
  
positive.code: 
          final wasSelected = extensionState.isSelected;
  
          serviceManager.serviceExtensionManager!.setServiceExtensionState(
            extensionState.description.extension,
            enabled: !wasSelected,
            value: wasSelected
  
negative.code:         });
        });
        // Track whether the extension is actually exposed by the VM.
        final listenable = serviceManager.serviceExtensionManager
            .hasServiceExtension(extensionName);
        extension.isAvailable = listenable.value;
        addAutoDisposeListener(
  