src/vs/workbench/contrib/notebook/browser/view/cellParts/cellContextKeys.ts/CellContextKeyPart/constructor
class CellContextKeyPart:	constructor(
		notebookEditor: INotebookEditorDelegate,
		@IInstantiationService private readonly instantiationService: IInstantiationService,
	) {
		super();

		this.cellContextKeyManager = this._register(this.instantiationService.createInstance(CellContextKeyManager, notebookEditor, undefined));
	}