diff -r 62dd2c794431 -r 62c327a1e23f vm/src/test/java/org/apidesign/vm4brwsr/Array.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/Array.java	Thu Jan 24 00:11:04 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/Array.java	Thu Jan 24 17:08:02 2013 +0100
@@ -112,6 +112,10 @@
         return Object[].class.getName();
     }
     
+    public static boolean instanceOfArray(Object obj) {
+        return obj instanceof Object[];
+    }
+    
     public static int sum(int size) {
         int[] arr = new int[size];
         return arr[0] + arr[1];