Extract updateIndexes method to ParentTag

Author: Glavo

src/main/java/org/glavo/nbt/tag/CompoundTag.java

@@ -115,9 +115,7 @@ public void remove(Tag tag) {
         tag.parent = null;
 
         // Update the index of the successor tags.
-        for (int i = subtagIndex; i < subTags.size(); i++) {
-            subTags.get(i).index = i;
-        }
+        updateIndexes(subtagIndex);
     }
 
     @Override

src/main/java/org/glavo/nbt/tag/ListTag.java

@@ -149,9 +149,7 @@ public void remove(Tag tag) {
         tag.parent = null;
 
         // Update the index of the successor tags.
-        for (int i = subtagIndex; i < subTags.size(); i++) {
-            subTags.get(i).index = i;
-        }
+        updateIndexes(subtagIndex);
     }
 
     @Override

src/main/java/org/glavo/nbt/tag/ParentTag.java

@@ -37,6 +37,12 @@ protected ParentTag(String name) {
     /// @see Tag#setName(String)
     abstract void updateSubTagName(Tag tag, String name) throws IllegalStateException;
 
+    protected final void updateIndexes(int startIndex) {
+        for (int i = startIndex, end = subTags.size(); i < end; i++) {
+            subTags.get(i).index = i;
+        }
+    }
+
     /// Returns `true` if this tag is the root tag, `false` otherwise.
     public final boolean isRoot() {
         return parent == null;