src/vs/workbench/contrib/notebook/common/model/notebookTextModel.ts/NotebookTextModel/pushStackElement
class NotebookTextModel:	pushStackElement(label: string, selectionState: ISelectionState | undefined, undoRedoGroup: UndoRedoGroup | undefined) {
		this._operationManager.pushStackElement(label, selectionState, undoRedoGroup, this.alternativeVersionId);
	}