Arranger -> Arrangement; ArrangerStandalone -> Arranger

crates/tek_sequencer/src/sequencer.rs

@@ -412,3 +412,20 @@ pub fn write_midi_output (writer: &mut MidiWriter, output: &MIDIChunk, frames: u
         }
     }
 }
+
+#[derive(Default)]
+pub struct SequencerProxy<E: Engine>(pub PhantomData<E>, pub bool);
+
+impl Handle<Tui> for SequencerProxy<Tui> {
+    fn handle (&mut self, _: &TuiInput) -> Perhaps<bool> { unreachable!() }
+}
+
+impl Content for SequencerProxy<Tui> {
+    type Engine = Tui;
+    fn content (&self) -> impl Widget<Engine = Tui> { "" }
+}
+
+impl Focusable<Tui> for SequencerProxy<Tui> {
+    fn is_focused (&self) -> bool { self.1 }
+    fn set_focused (&mut self, focus: bool) { self.1 = focus }
+}