src/vs/workbench/contrib/extensions/browser/extensionsActions.ts/SetProductIconThemeAction/constructor
class SetProductIconThemeAction:	constructor(
		@IExtensionService extensionService: IExtensionService,
		@IWorkbenchThemeService private readonly workbenchThemeService: IWorkbenchThemeService,
		@IQuickInputService private readonly quickInputService: IQuickInputService
	) {
		super(SetProductIconThemeAction.ID, SetProductIconThemeAction.TITLE.value, SetProductIconThemeAction.DisabledClass, false);
		this._register(Event.any<any>(extensionService.onDidChangeExtensions, workbenchThemeService.onDidProductIconThemeChange)(() => this.update(), this));
		workbenchThemeService.getProductIconThemes().then(productIconThemes => {
			this.productIconThemes = productIconThemes;
			this.update();
		});
		this.update();
	}