src/vs/workbench/contrib/themes/browser/themes.contribution.ts/configurationEntries
function configurationEntries(extensionGalleryService: IExtensionGalleryService, label: string | undefined): QuickPickInput<ThemeItem>[] {
	if (extensionGalleryService.isEnabled() && label !== undefined) {
		return [
			{
				type: 'separator'
			},
			{
				id: undefined,
				label: label,
				alwaysShow: true
			}
		];
	}
	return [];
}