{"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"if"}]}
            if let Some(&ty::Coroutine(coroutine_def_id, args)) = ty.map(Ty::kind) {
            // of this function. Is this intentional?
                let coroutine_body = tcx.optimized_mir(coroutine_def_id);