Sled-flavored KV abstraction layer
let bta = BTreeAdapter::new();
braap(bta);
let tmpdir = tempfile::tempdir().unwrap();
let sa = SledAdapter::open(tmpdir.path()).unwrap();
braap(sa);
fn braap<T:Toboggan>( store: T ){
let beasts = store.open_tree("beasts").unwrap();
beasts.insert("meow", "cat").unwrap();
}