+ DEBUG_TRACE (DEBUG::Destruction, string_compose ("delivery %1 destructor\n", _name));
+
+ /* this object should vanish from any signal callback lists
+ that it is on before we get any further. The full qualification
+ of the method name is not necessary, but is here to make it
+ clear that this call is about signals, not data flow connections.
+ */
+
+ ScopedConnectionList::drop_connections ();
+