syntax_data: {"ast_node_type":"variable","tokens":[{"end":80,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                         let def_id = self.tcx.hir_enclosing_body_owner(self.id);
context_before:                     {
context_after:                         let generics = self.tcx.generics_of(def_id);