message: Implement `Drawable` for slices of drawables
diff: @@ -25,3 +25,12 @@ where
  T::draw(self, frame)
  }
  }
  +
  +impl<T> Drawable for &[T]
  +where
  + T: Drawable,
  +{
  + fn draw(&self, frame: &mut Frame) {
  + self.iter().for_each(|drawable| drawable.draw(frame));
  + }
  +}
  