src/vs/platform/actions/browser/menuEntryActionViewItem.ts/SubmenuEntrySelectActionViewItem/render
class SubmenuEntrySelectActionViewItem:	override render(container: HTMLElement): void {
		super.render(container);
		this._register(attachStylerCallback(this.themeService, { selectBorder }, colors => {
			container.style.borderColor = colors.selectBorder ? `${colors.selectBorder}` : '';
		}));
	}