{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//"}]}
        // HACK(async_closures): For async closures, prefer `AsyncFn*`
    ) -> Option<(Option<Adjustment<'tcx>>, MethodCallee<'tcx>)> {
        // over `Fn*`, since all async closures implement `FnOnce`, but