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._pauseableEmitter.fire({
			rawEvents: [{
				kind: NotebookCellsChangeType.Output,
				index: this._cells.indexOf(cell),
				outputs: cell.outputs ?? [],
				append,
				transient: this.transientOptions.transientOutputs,
			}],
			versionId: this.versionId,
			synchronous: true,
			endSelectionState: undefined
		});
	}