{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"Some(Mixed(chunk_domain_size,"}]}
            Some(Mixed(chunk_domain_size, _, words)) => {
            Some(Ones(chunk_domain_size)) => ChunkIter::Ones(0..*chunk_domain_size as usize),
                let num_words = num_words(*chunk_domain_size as usize);