Add option to use old client method argument order for now
diff --git a/src/node/index.js b/src/node/index.js
index 1c19772..6567d56 100644
--- a/src/node/index.js
+++ b/src/node/index.js
@@ -87,6 +87,10 @@
* Buffers. Defaults to false
* - longsAsStrings: deserialize long values as strings instead of objects.
* Defaults to true
+ * - deprecatedArgumentOrder: Use the beta method argument order for client
+ * methods, with optional arguments after the callback. Defaults to false.
+ * This option is only a temporary stopgap measure to smooth an API breakage.
+ * It is deprecated, and new code should not use it.
* @param {string|{root: string, file: string}} filename The file to load
* @param {string=} format The file format to expect. Must be either 'proto' or
* 'json'. Defaults to 'proto'