BUG-4803: make MutableOffsetMap abstract

[yangtools.git] / common / util / src / main / java / org / opendaylight / yangtools / util / UnmodifiableCollection.java

diff --git a/common/util/src/main/java/org/opendaylight/yangtools/util/UnmodifiableCollection.java b/common/util/src/main/java/org/opendaylight/yangtools/util/UnmodifiableCollection.java
index dc090a4c5bb90dd9f4f18e9cfa2980c340072470..9d5cfe1a72af84c5d2c48aa33c4892e496d8d9d4 100644 (file)
--- a/common/util/src/main/java/org/opendaylight/yangtools/util/UnmodifiableCollection.java
+++ b/common/util/src/main/java/org/opendaylight/yangtools/util/UnmodifiableCollection.java
@@ -136,7 +136,7 @@ public final class UnmodifiableCollection<E> implements Collection<E>, Serializa
 
     @Override
     public String toString() {
-        final StringBuffer sb = new StringBuffer("UnmodifiableCollection{");
+        final StringBuilder sb = new StringBuilder("UnmodifiableCollection{");
         sb.append(delegate);
         return sb.toString();
     }