Fix compilation warning from LocalClassRenamingTest

Change-Id: I712d1a01c9a768fbb372f651c4dc96b3c36dc7a7
diff --git a/src/test/java/com/android/tools/r8/naming/b132460884/LocalClassRenamingTest.java b/src/test/java/com/android/tools/r8/naming/b132460884/LocalClassRenamingTest.java
index 4d82789..eb17213 100644
--- a/src/test/java/com/android/tools/r8/naming/b132460884/LocalClassRenamingTest.java
+++ b/src/test/java/com/android/tools/r8/naming/b132460884/LocalClassRenamingTest.java
@@ -29,7 +29,7 @@
     this.map = new HashMap<>();
   }
 
-  public static <K, V> TestMap of(K k, V v) {
+  public static <K, V> TestMap<K, V> of(K k, V v) {
     TestMap<K, V> m = new TestMap<>();
     m.map.put(k, v);
     return m;