{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"self.tcx.fn_sig(sig_id).skip_binder().bound_vars().iter().collect();"}]}
                self.tcx.fn_sig(sig_id).skip_binder().bound_vars().iter().collect();
            let bound_vars: Vec<_> =
            let hir_id = self.tcx.local_def_id_to_hir_id(def_id);