{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"//"}]}
    // mentioned item. So instead we collect all pre-monomorphized `MentionedItem` that were already
    // scan and not very efficient. Furthermore we can only do that *after* monomorphizing the
    // added to `used_items` in a hash set, which can efficiently query in the