pub fn get(store: Store(a)) -> a

pub fn make(value: a) -> Store(a)

pub fn set(store: Store(a), value: a) -> Store(a)

pub fn subscribe(
  store: Store(a),
  callback: fn(a) -> Nil,
) -> #(Store(a), fn(Store(a)) -> Store(a))

pub fn subscriber_count(store: Store(a)) -> Int

pub fn update(store: Store(a), updater: fn(a) -> a) -> Store(a)