{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"buffer:"}]}
    buffer: tt::TokenTreesView<'_, SpanData<Ctx>>,
pub fn to_parser_input<Ctx: Copy + fmt::Debug + PartialEq + Eq + Hash>(
    span_to_edition: &mut dyn FnMut(Ctx) -> Edition,