{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":".probe_instantiate_query_response(span,"}]}
                    .probe_instantiate_query_response(span, &orig_values, ty)
                let ty = self
                    .unwrap_or_else(|_| span_bug!(span, "instantiating {:?} failed?", ty));