message: impl DoubleEndedIterator for VMIntoIterHash
  Summary: Other iterators do.
diff: @@ -207,6 +207,10 @@ impl<K, V> ExactSizeIterator for VMIntoIterHash<K, V> {
  }
  }
  +impl<K, V> DoubleEndedIterator for VMIntoIterHash<K, V> {
  + def_double_ended_iter!();
  +}
  +
  pub struct IntoIter<K, V> {
  pub(crate) iter: std::vec::IntoIter<Bucket<K, V>>,
  }
  