Object getSessionKey(Object obj) { Adapter ad = getAdapter(obj); return ad.getSessionKey(obj);
Object getSessionKey(PropertyMap pmap) { ObjectType ot = pmap.getObjectType(); Adapter ad = m_root.getAdapter(ot); return ad.getSessionKey(ot, pmap);
    Object getSessionKey(Object obj) {        Adapter ad = getAdapter(obj);        return ad.getSessionKey(obj);    }