{"ast_node_type":"variable","tokens":[{"end":47,"kind":"keyword","start":0,"text":"let"}]}
        let num_words = num_words(domain_size);
    pub fn new_empty(domain_size: usize) -> DenseBitSet<T> {
        DenseBitSet { domain_size, words: smallvec![0; num_words], marker: PhantomData }