syntax_data: {"ast_node_type":"variable","tokens":[{"end":43,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let (def_id, user_ty) = match res {
context_after:             Res::Def(DefKind::Const, def_id) | Res::Def(DefKind::AssocConst, def_id) => {