{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//"}]}
            // not know what its `closure_kind` is yet. Instead, just fill in the
            // When calling a `CoroutineClosure` that is local to the body, we will
            // signature with an infer var for the `tupled_upvars_ty` of the coroutine,