How to properly set up store type when using setup store?

[vatosarmat]

Documentation is clear for option store. But how to do it with setup store? For example this in code below

export const useEntitiesStore = defineStore('entities', () => {
  const data = {
    contact: ref<Record<number, Entity>>([]),
    company: ref<Record<number, Entity>>([]),
    lead: ref<Record<number, Entity>>([]),
  }

  const isLoading = ref(false)
  const errorMessage = ref('')

  async function apiCreateEntity(kind: EntityKind, name: string) {
    //@ts-expect-error
    this.$patch(state => {
      state.isLoading = true
      state.errorMessage = ''
    })