src/vs/workbench/contrib/notebook/browser/services/notebookServiceImpl.ts/NotebookService/notebookProviderInfoStore
class NotebookService:	private get notebookProviderInfoStore(): NotebookProviderInfoStore {
		if (!this._notebookProviderInfoStore) {
			this._notebookProviderInfoStore = this._register(this._instantiationService.createInstance(NotebookProviderInfoStore));
		}

		return this._notebookProviderInfoStore;
	}