message: Added rustdoc for MultiFruit extract function
diff: @@ -87,6 +87,10 @@ pub struct FruitHandle<TFruit: Fruit> {
  }
  impl<TFruit: Fruit> FruitHandle<TFruit> {
  + // Extract a typed fruit off a multifruit.
  + //
  + // This function involves downcasting and can panic if the multifruit was
  + // created using faulty code.
  pub fn extract(self, fruits: &mut MultiFruit) -> TFruit {
  let boxed_fruit = fruits.sub_fruits[self.pos].take().expect("");
  *boxed_fruit
  