{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
    let entries: Vec<_> = vec![(2, 0), (1, 0), (2, 1), (3, 0), (2, 2)];
fn test_sorted_index_multi_map() {
    let set: SortedIndexMultiMap<usize, _, _> = entries.iter().copied().collect();