public static boolean equals(byte[][] a, byte[][] b) {
        if (a == null || b == null) {
            return false;
        }
        if (a.length != b.length) {
            return false;
        }
        for (int i = 0; i < a.length; i++) {
            if (!Arrays.equals(a[i], b[i])) {
                return false;
            }
        }
        return true;
    }
A simple object used to pass a single object from one thread to
another.
jrt/tests/com/yahoo/jrt/Test.java