message: refactor(chunk): add size_hint to chunk::IntoIter
diff: @@ -177,5 +177,12 @@ impl Iterator for IntoIter {
  fn next(&mut self) -> Option<Self::Item> {
  self.inner.next()
  }
  +
  + #[inline]
  + fn size_hint(&self) -> (usize, Option<usize>) {
  + self.inner.size_hint()
  }
  +}
  +
  +impl ExactSizeIterator for IntoIter {}
  