{"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"bitset.insert(99);"}]}
    bitset.insert(99);
    bitset.insert(66);
    assert_eq!(bitset.iter().collect::<Vec<_>>(), [1, 10, 19, 62, 63, 64, 65, 66, 99]);