src/vs/workbench/services/preferences/common/preferencesModels.ts/SettingsEditorModel/constructor
class SettingsEditorModel:	constructor(reference: IReference<ITextEditorModel>, private _configurationTarget: ConfigurationTarget) {
		super();
		this.settingsModel = reference.object.textEditorModel!;
		this._register(this.onWillDispose(() => reference.dispose()));
		this._register(this.settingsModel.onDidChangeContent(() => {
			this._settingsGroups = undefined;
			this._onDidChangeGroups.fire();
		}));
	}