enable with hidden setting

src/vs/workbench/contrib/notebook/browser/contrib/notebookVariables/notebookVariables.ts

@@ -15,27 +15,28 @@ import { NotebookVariablesView } from 'vs/workbench/contrib/notebook/browser/con
 import { NOTEBOOK_KERNEL } from 'vs/workbench/contrib/notebook/common/notebookContextKeys';
 import { variablesViewIcon } from 'vs/workbench/contrib/notebook/browser/notebookIcons';
 import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
+import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
 
 
 export class NotebookVariables extends Disposable implements IWorkbenchContribution {
 	private listener: IDisposable;
 
 	constructor(
-		@IEditorService private readonly editorService: IEditorService
+		@IEditorService private readonly editorService: IEditorService,
+		@IConfigurationService configurationService: IConfigurationService
 	) {
 		super();
-		this.initializeView();
 
 		this.listener = this.editorService.onDidEditorsChange(() => {
-			if (this.editorService.activeEditorPane?.getId() === 'workbench.editor.notebook') {
+			if (configurationService.getValue('notebook.experimental.kernelVariableView')
+				&& this.editorService.activeEditorPane?.getId() === 'workbench.editor.notebook') {
 				this.listener.dispose();
 				this.initializeView();
 			}
 		});
 	}
 
 	private async initializeView() {
-
 		const debugViewContainer = Registry.as<IViewContainersRegistry>('workbench.registry.view.containers').get(debugContainerId);
 
 		if (debugViewContainer) {
@@ -47,7 +48,5 @@ export class NotebookVariables extends Disposable implements IWorkbenchContribut
 
 			viewsRegistry.registerViews([viewDescriptor], debugViewContainer);
 		}
-
 	}
-
 }