src/vs/editor/standalone/browser/standaloneThemeServiceImpl.ts/StandaloneThemeServiceImpl/_updateCSS
class StandaloneThemeServiceImpl:	private _updateCSS(): void {
		this._allCSS = `${this._codiconCSS}\n${this._themeCSS}`;
		this._styleElements.forEach(styleElement => styleElement.textContent = this._allCSS);
	}