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,
		@IWorkbenchExtensionEnablementService private readonly extensionEnablementService: IWorkbenchExtensionEnablementService,
	) {
		super(SetProductIconThemeAction.ID, SetProductIconThemeAction.TITLE.value, SetProductIconThemeAction.DisabledClass, false);
		this._register(Event.any<any>(extensionService.onDidChangeExtensions, workbenchThemeService.onDidProductIconThemeChange)(() => this.update(), this));
		this.update();
	}