feat: updates

src/map_util.rs

@@ -0,0 +1,11 @@
+use std::collections::BTreeMap;
+
+pub(crate) trait BTreeMapAddKv<K: Ord, V> {
+    fn insert_kv(&mut self, key: impl Into<K>, value: impl Into<V>);
+}
+
+impl<K: Ord, V> BTreeMapAddKv<K, V> for BTreeMap<K, V> {
+    fn insert_kv(&mut self, key: impl Into<K>, value: impl Into<V>) {
+        self.insert(key.into(), value.into());
+    }
+}