1 files changed, 8 insertions, 9 deletions
diff --git a/app/src/main/java/com/wireguard/android/databinding/ObservableTreeMap.java b/app/src/main/java/com/wireguard/android/databinding/ObservableTreeMap.java
index dc5f705b..074e122c 100644
--- a/app/src/main/java/com/wireguard/android/databinding/ObservableTreeMap.java
+++ b/app/src/main/java/com/wireguard/android/databinding/ObservableTreeMap.java
@@ -12,16 +12,10 @@ import java.util.TreeMap;
  * views. This behavior is in line with that of ObservableArrayMap.
  */
 
-public class ObservableTreeMap<K, V> extends TreeMap<K, V> implements ObservableSortedMap<K, V> {
+public class ObservableTreeMap<K, V> extends TreeMap<K, V> implements ObservableNavigableMap<K, V> {
     private transient MapChangeRegistry listeners;
 
     @Override
-    public void clear() {
-        super.clear();
-        notifyChange(null);
-    }
-
-    @Override
     public void addOnMapChangedCallback(
             final OnMapChangedCallback<? extends ObservableMap<K, V>, K, V> listener) {
         if (listeners == null)
@@ -29,6 +23,12 @@ public class ObservableTreeMap<K, V> extends TreeMap<K, V> implements Observable
         listeners.add(listener);
     }
 
+    @Override
+    public void clear() {
+        super.clear();
+        notifyChange(null);
+    }
+
     private void notifyChange(final K key) {
         if (listeners != null)
             listeners.notifyChange(this, key);
@@ -51,8 +51,7 @@ public class ObservableTreeMap<K, V> extends TreeMap<K, V> implements Observable
     @Override
     public V remove(final Object key) {
         final V oldValue = super.remove(key);
-        @SuppressWarnings("unchecked")
-        final K k = (K) key;
+        @SuppressWarnings("unchecked") final K k = (K) key;
         notifyChange(k);
         return oldValue;
     }