Wrong geter type when written in setup style

[Chapaev17]

In setup postById has type Post when it should be a (id: number) => Post.

Store:

export const usePostsStore = defineStore(
  "posts",
  () => {
    const posts = ref<Post[]>([])

    const postById = computed(() => {
      return (id: Post["id"]:) => posts.value.find(post => post.id === id)
    })

    return { posts, postById }
  }
)

Component setup:

const postsStore = usePostsStore()
const route = useRoute()
const { postById } = storeToRefs(postsStore)
const post = computed(() => postById.value(route.value.params.post_id))