message: Added specialized implementation for count/count_including... in &mut DocSet
diff: @@ -129,6 +129,14 @@ impl<'a> DocSet for &'a mut dyn DocSet {
  fn size_hint(&self) -> u32 {
  (**self).size_hint()
  }
  +
  + fn count(&mut self, delete_bitset: &DeleteBitSet) -> u32 {
  + (**self).count(delete_bitset)
  + }
  +
  + fn count_including_deleted(&mut self) -> u32 {
  + (**self).count_including_deleted()
  + }
  }
  impl<TDocSet: DocSet + ?Sized> DocSet for Box<TDocSet> {
  