src/vs/workbench/api/common/extHostNotebook.ts/ExtHostNotebookController/$dataToNotebook
class ExtHostNotebookController:	async $dataToNotebook(handle: number, bytes: VSBuffer, token: CancellationToken): Promise<SerializableObjectWithBuffers<NotebookDataDto>> {
		const serializer = this._notebookSerializer.get(handle);
		if (!serializer) {
			throw new Error('NO serializer found');
		}
		const data = await serializer.deserializeNotebook(bytes.buffer, token);
		return new SerializableObjectWithBuffers(typeConverters.NotebookData.from(data));
	}