{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
        let suggest_direct_use = |e: &mut Diag<'_>, sp: Span| {
        // i.e., replacing `<..., T = A, ...>` with `<..., A, ...>`.
            if let Ok(snippet) = tcx.sess.source_map().span_to_snippet(sp) {