src/vs/workbench/contrib/debug/browser/debugHover.ts/DebugHoverWidget/constructor
class DebugHoverWidget:	constructor(
		private editor: ICodeEditor,
		@IDebugService private readonly debugService: IDebugService,
		@IInstantiationService private readonly instantiationService: IInstantiationService,
		@IThemeService private readonly themeService: IThemeService,
		@ILanguageFeaturesService private readonly languageFeaturesService: ILanguageFeaturesService,
	) {
		this.toDispose = [];

		this._isVisible = false;
		this.showAtPosition = null;
		this.highlightDecorations = [];
		this.positionPreference = [ContentWidgetPositionPreference.ABOVE, ContentWidgetPositionPreference.BELOW];
	}