src/vs/workbench/contrib/webviewPanel/browser/webviewIconManager.ts/WebviewIconManager/constructor
class WebviewIconManager:	constructor(
		@ILifecycleService private readonly _lifecycleService: ILifecycleService,
		@IConfigurationService private readonly _configService: IConfigurationService,
	) {
		this._configService.onDidChangeConfiguration(e => {
			if (e.affectsConfiguration('workbench.iconTheme')) {
				this.updateStyleSheet();
			}
		});
	}