{"ast_node_type":"import","tokens":[{"end":100,"kind":"keyword","start":0,"text":"///"}]}
/// `SortedIndexMultiMap` require *O*(*n*) time to insert a single item. This is because we may need
/// Unlike a general-purpose map like `BTreeSet` or `HashSet`, `SortedMap` and
/// to insert into the middle of the sorted array. Users should avoid mutating this data structure