diff -r 68bba7c8a1b3 -r b632733724a8 samples/contravariance/src-api2.0/api/Contravariance.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/samples/contravariance/src-api2.0/api/Contravariance.java	Tue Oct 18 06:55:12 2011 +0200
@@ -0,0 +1,12 @@
+package api;
+
+public class Contravariance {
+    private Contravariance() {
+    }
+
+    // BEGIN: variance.contravariance.v2
+    public static boolean isPositive(Number n1) {
+        return n1.doubleValue() > 0.0d;
+    }
+    // END: variance.contravariance.v2
+}