src/vs/workbench/contrib/extensions/browser/extensionsActions.ts/SetColorThemeAction/constructor
class SetColorThemeAction:	constructor(
		private colorThemes: IWorkbenchColorTheme[],
		@IExtensionService extensionService: IExtensionService,
		@IWorkbenchThemeService private readonly workbenchThemeService: IWorkbenchThemeService,
		@IQuickInputService private readonly quickInputService: IQuickInputService,
	) {
		super(`extensions.colorTheme`, localize('color theme', "Set Color Theme"), SetColorThemeAction.DisabledClass, false);
		this._register(Event.any<any>(extensionService.onDidChangeExtensions, workbenchThemeService.onDidColorThemeChange)(() => this.update(), this));
		this.update();
	}