use case ``` const tagService = useService(TagService); const tags = useLiveData(tagService.tags); const currentTagLiveData = tagService.tagByTagId(tagId); const currentTag = useLiveData(currentTagLiveData); ```
use case ``` const tagService = useService(TagService); const tags = useLiveData(tagService.tags); const currentTagLiveData = tagService.tagByTagId(tagId); const currentTag = useLiveData(currentTagLiveData); ```