src/vs/workbench/contrib/notebook/browser/notebook.contribution.ts/NotebookLanguageSelectorScoreRefine/_getNotebookInfo
class NotebookLanguageSelectorScoreRefine:	private _getNotebookInfo(uri: URI): NotebookInfo | undefined {
		const cellUri = CellUri.parse(uri);
		if (!cellUri) {
			return undefined;
		}
		const notebook = this._notebookService.getNotebookTextModel(cellUri.notebook);
		if (!notebook) {
			return undefined;
		}
		return {
			uri: notebook.uri,
			type: notebook.viewType
		};
	}