How to watch/$subscribe getters?

[varna]

I use a reactive library, so I need to pass updated getter data to it every time it updates:

  const store = useMapStore()
  store.$subscribe((mutation, state) => {
    handleUpdate(store.FeatureCollection)
  })

$subscribe sounded logical, but it ignores getters.

[varna]

  import { useMapStore } from '@/stores/map'
  import { watch } from '@vue/composition-api'
  import { storeToRefs } from 'pinia'

  const store = useMapStore()
  const { FeatureCollection } = storeToRefs(store)
  watch(FeatureCollection, handleUpdate)