src/vs/workbench/api/common/extHostNotebookKernels.ts/NotebookCellExecutionTask/updateOutputs
class NotebookCellExecutionTask:	private async updateOutputs(outputs: vscode.NotebookCellOutput | vscode.NotebookCellOutput[], cell: vscode.NotebookCell | undefined, append: boolean): Promise<void> {
		const handle = this.cellIndexToHandle(cell);
		const outputDtos = this.validateAndConvertOutputs(asArray(outputs));
		return this.applyEditSoon({ editType: CellEditType.Output, handle, append, outputs: outputDtos });
	}