feat: add value_mut function (#155)

Author: mattsse

src/kbucket/bucket.rs

@@ -653,7 +653,7 @@ where
     ///
     /// Returns `None` if the given key does not refer to an node in the
     /// bucket.
-    fn get_mut(&mut self, key: &Key<TNodeId>) -> Option<&mut Node<TNodeId, TVal>> {
+    pub fn get_mut(&mut self, key: &Key<TNodeId>) -> Option<&mut Node<TNodeId, TVal>> {
         self.nodes.iter_mut().find(move |p| &p.key == key)
     }
 

src/kbucket/entry.rs

@@ -128,6 +128,16 @@ where
             .value
     }
 
+    /// Returns mutable access value associated with the key.
+    pub fn value_mut(&mut self) -> &mut TVal {
+        &mut self
+            .0
+            .bucket
+            .get_mut(self.0.key)
+            .expect("We can only build a ConnectedEntry if the entry is in the bucket; QED")
+            .value
+    }
+
     /// Sets the status of the entry.
     /// This can fail if the new state violates buckets or table conditions.
     pub fn update(