Function sanakirja_core::btree::del::del_no_decr

pub fn del_no_decr<T: AllocPage + LoadPage, K: Storable + ?Sized + PartialEq, V: Storable + ?Sized + PartialEq, P: BTreeMutPage<K, V>>(
    txn: &mut T,
    db: &mut Db_<K, V, P>,
    key: &K,
    value: Option<&V>
) -> Result<bool, T::Error>

If value is None, delete the first entry for key from the database, if present. Else, delete the entry for (key, value), if present.