{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"(ty::ClosureKind::Fn,"}]}
        (ty::ClosureKind::Fn, ty::ClosureKind::Fn)
    match (actual_closure_kind, trait_closure_kind) {
        | (ty::ClosureKind::FnMut, ty::ClosureKind::FnMut)