src/vs/workbench/contrib/preferences/browser/preferencesRenderers.ts/SettingHighlighter/constructor
class SettingHighlighter:	constructor(private editor: ICodeEditor, private readonly focusEventEmitter: Emitter<ISetting>, private readonly clearFocusEventEmitter: Emitter<ISetting>,
		@IInstantiationService instantiationService: IInstantiationService
	) {
		super();
		this.fixedHighlighter = this._register(instantiationService.createInstance(RangeHighlightDecorations));
		this.volatileHighlighter = this._register(instantiationService.createInstance(RangeHighlightDecorations));
		this.fixedHighlighter.onHighlightRemoved(() => this.clearFocusEventEmitter.fire(this.highlightedSetting));
		this.volatileHighlighter.onHighlightRemoved(() => this.clearFocusEventEmitter.fire(this.highlightedSetting));
	}