{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"self.mark_as_used_if_union(*adt,"}]}
                    self.mark_as_used_if_union(*adt, fields);
                if let ty::Adt(adt, _) = self.typeck_results().expr_ty(expr).kind() {
                }