src/vs/workbench/contrib/notebook/common/model/notebookTextModel.ts/NotebookTextModel/_spliceNotebookCellOutputs
class NotebookTextModel:	private _spliceNotebookCellOutputs(cell: NotebookCellTextModel, splice: NotebookCellOutputsSplice, append: boolean, computeUndoRedo: boolean): void {
		cell.spliceNotebookCellOutputs(splice);

		this._eventEmitter.emit({
			kind: NotebookCellsChangeType.Output,
			index: this._cells.indexOf(cell),
			outputs: cell.outputs ?? [],
			append,
			transient: this.transientOptions.transientOutputs,
		}, true);
	}