{"ast_node_type":"function","tokens":[{"end":59,"kind":"keyword","start":0,"text":"fn"}]}
    fn union(&mut self, other: &ChunkedBitSet<T>) -> bool {
impl<T: Idx> BitRelations<ChunkedBitSet<T>> for DenseBitSet<T> {
        sequential_update(|elem| self.insert(elem), other.iter())