src/vs/workbench/contrib/notebook/browser/notebookEditorDecorations.ts/NotebookDecorationCSSRules/constructor
class NotebookDecorationCSSRules:	constructor(
		private readonly _themeService: IThemeService,
		private readonly _styleSheet: NotebookRefCountedStyleSheet,
		private readonly _providerArgs: ProviderArguments
	) {
		this._styleSheet.ref();
		this._theme = this._themeService.getColorTheme();
		this._className = CSSNameHelper.getClassName(this._providerArgs.key, CellDecorationCSSRuleType.ClassName);
		this._topClassName = CSSNameHelper.getClassName(this._providerArgs.key, CellDecorationCSSRuleType.TopClassName);
		this._buildCSS();
	}