src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/createMarkupCellInitialization
class NotebookEditorWidget:	private createMarkupCellInitialization(model: ICellViewModel, offset: number): IMarkupCellInitialization {
		return ({
			mime: model.mime,
			cellId: model.id,
			cellHandle: model.handle,
			content: model.getText(),
			offset: offset,
			visible: false,
			metadata: model.metadata,
		});
	}