Contract of Session.attach() and Session.detach()

[Martin Funk]

Hi,

what is the contract of Session.attach() and Session.detach() ?
Especially, is it intended that after a call to attach() that there will 
be at least one call to detach() before the request goes back to the client?
If that's the case, then there might be a bug in Session and I propose
the following patch on org.apache.wicket.Session

Index: .
===================================================================
--- .    (revision 579354)
+++ .    (working copy)
@@ -305,6 +305,11 @@
     */
    public static void unset()
    {
+        Session session = (Session)current.get();
+        if (session == null)
+    {
+        session.detach();
+    }
        current.set(null);
    }


Martin