src/vs/workbench/contrib/notebook/browser/notebookServiceImpl.ts/NotebookService/getToCopy
class NotebookService:	getToCopy(): { items: NotebookCellTextModel[]; isCopy: boolean } | undefined {
		if (this._cutItems) {
			return { items: this._cutItems, isCopy: this._lastClipboardIsCopy };
		}

		return undefined;
	}