syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"def::Res::Def(defkind,"}]}
source_snippet:                 def::Res::Def(defkind, def_id) => {
context_before:                 def::Res::Def(DefKind::TyAlias, _) => {}
context_after:                     if let Some(ns) = defkind.ns() {