src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/getBaseCellEditorOptions
class NotebookEditorWidget:	getBaseCellEditorOptions(language: string): IBaseCellEditorOptions {
		const existingOptions = this._baseCellEditorOptions.get(language);

		if (existingOptions) {
			return existingOptions;
		} else {
			const options = new BaseCellEditorOptions(this, this.notebookOptions, this.configurationService, language);
			this._baseCellEditorOptions.set(language, options);
			return options;
		}
	}