{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"//"}]}
    // impls for `Copy`. Let's short-circuit here for this validity check, since a lot of them
    // HACK (not that bad of a hack don't worry): Some codegen tests don't even define proper
    // use unions. We should eventually fix all the tests to define that lang item or use