{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"(MixedBitSet::Small(set),"}]}
            (MixedBitSet::Small(set), MixedBitSet::Small(other)) => set.union(other),
        match (self, other) {
            (MixedBitSet::Large(set), MixedBitSet::Large(other)) => set.union(other),