{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"match"}]}
    match tcx.sess.source_map().span_to_snippet(span) {
fn suggest_ampmut_self(tcx: TyCtxt<'_>, span: Span) -> (Span, String) {
        Ok(snippet) if snippet.ends_with("self") => {