src/vs/workbench/services/preferences/common/preferencesModels.ts/DefaultSettingsEditorModel/constructor
class DefaultSettingsEditorModel:	constructor(
		private _uri: URI,
		reference: IReference<ITextEditorModel>,
		private readonly defaultSettings: DefaultSettings
	) {
		super();

		this._register(defaultSettings.onDidChange(() => this._onDidChangeGroups.fire()));
		this._model = reference.object.textEditorModel!;
		this._register(this.onWillDispose(() => reference.dispose()));
	}