Function cyclotron::lazy_set::to_eager

pub fn to_eager<K, V, A>(
    lazy_f: impl FnOnce(K) -> A + Clone
) -> impl FnOnce(&mut dyn FnMut(K) -> BTreeSet<V>, K) -> BTreeSet<V> + Clone where
    K: Copy + Eq + Hash + Debug,
    V: Clone + Ord + Debug,
    A: LazySet<Call<K>, V, Item = V>,