syntax_data: {"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"Res::Def(DefKind::Variant"}]}
source_snippet:             Res::Def(DefKind::Variant | DefKind::Ctor(CtorOf::Struct, _), def_id) => {
context_before:             }
context_after:                 Some(self.parent(def_id))