How can i use mapActions, or mapGetters with using classes?

in vuex they use:

computed: {
...mapState('foo', {
// state is the state of the foo/ module instead of root
bar: state => state.bar
}
},
methods: {
...mapActions('foo', [
// map this.doSomething() to this.$store.dispatch('foo/doSomething')
'doSomething'
])
}