extensions/ipynb/src/deserializers.ts/createNotebookCellDataFromRawCell
function createNotebookCellDataFromRawCell(cell: nbformat.IRawCell): NotebookCellData {
	const cellData = new NotebookCellData(NotebookCellKind.Code, concatMultilineString(cell.source), 'raw');
	cellData.outputs = [];
	cellData.metadata = getNotebookCellMetadata(cell);
	return cellData;
}