src/vs/workbench/browser/parts/auxiliarybar/auxiliaryBarActions.ts/ToggleAuxiliaryBarAction/constructor
class ToggleAuxiliaryBarAction:	constructor(
		id: string,
		name: string,
		@IWorkbenchLayoutService private readonly layoutService: IWorkbenchLayoutService
	) {
		super(id, name, layoutService.isVisible(Parts.AUXILIARYBAR_PART) ? 'auxiliaryBar expanded' : 'auxiliaryBar');
	}