syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"Res::Def(DefKind::Ctor(_,"}]}
source_snippet:             Res::Def(DefKind::Ctor(_, CtorKind::Const), def_id) => {
context_after:                 let user_provided_types = self.typeck_results.user_provided_types();