export isError as types.isNativeError

util.js

@@ -521,6 +521,7 @@ function isError(e) {
       (objectToString(e) === '[object Error]' || e instanceof Error);
 }
 exports.isError = isError;
+exports.types.isNativeError = isError;
 
 function isFunction(arg) {
   return typeof arg === 'function';