syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // FIXME(coroutine_clone): We could uplift this into `collect_predicates_for_types`
context_after:             // and do this for `Copy`/`Clone` too, but that's feature-gated so it doesn't really