src/vs/editor/contrib/parameterHints/browser/parameterHintsWidget.ts/ParameterHintsWidget/constructor
class ParameterHintsWidget:	constructor(
		private readonly editor: ICodeEditor,
		private readonly model: ParameterHintsModel,
		@IContextKeyService contextKeyService: IContextKeyService,
		@IOpenerService openerService: IOpenerService,
		@ILanguageService languageService: ILanguageService,
	) {
		super();

		this.markdownRenderer = this._register(new MarkdownRenderer({ editor }, languageService, openerService));

		this.keyVisible = Context.Visible.bindTo(contextKeyService);
		this.keyMultipleSignatures = Context.MultipleSignatures.bindTo(contextKeyService);
	}