+ void revert_to_default_display ();
+
+ /** @return the delivery that is being edited using our fader; it will be the
+ * last send passed to ::show_send, or our route's main out delivery.
+ */
+ boost::shared_ptr<ARDOUR::Delivery> current_delivery () const {
+ return _current_delivery;
+ }
+
+ bool mixer_owned () const {
+ return _mixer_owned;
+ }