src/vs/workbench/contrib/notebook/browser/contrib/cellStatusBar/executionStatusBarItemController.ts/KeybindingPlaceholderStatusBarContrib/constructor
class KeybindingPlaceholderStatusBarContrib:	constructor(
		notebookEditor: INotebookEditor,
		@IInstantiationService instantiationService: IInstantiationService
	) {
		super();
		this._register(new NotebookStatusBarController(notebookEditor, (vm, cell) => instantiationService.createInstance(KeybindingPlaceholderStatusBarItem, vm, cell)));
	}