{"ast_node_type":"function","tokens":[{"end":40,"kind":"keyword","start":0,"text":"fn"}]}
    fn eq(&self, other: &Self) -> bool {
impl<I: Idx, K: PartialEq, V: PartialEq> PartialEq for SortedIndexMultiMap<I, K, V> {
        // No need to compare the sorted index. If the items are the same, the index will be too.