syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:                 match self.tcx().def_kind(parent) {
context_before:                 let parent = self.tcx().parent(def_id);
context_after:                     DefKind::TyAlias | DefKind::AssocTy => {