From f1f42164fcf212defa7cadab307151061cb9668c Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Sun, 8 Nov 2015 03:41:00 -0800
Subject: [PATCH] add toString to allow reflection of original traversal
 methods when wrapping for state

---
 packages/babel-traverse/src/visitors.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/babel-traverse/src/visitors.js b/packages/babel-traverse/src/visitors.js
index 39b780528b..81df24e88d 100644
--- a/packages/babel-traverse/src/visitors.js
+++ b/packages/babel-traverse/src/visitors.js
@@ -174,9 +174,11 @@ function wrapWithState(oldVisitor, state) {
     if (!Array.isArray(fns)) continue;
 
     fns = fns.map(function (fn) {
-      return function (path) {
+      let newFn = function (path) {
         return fn.call(state, path, state);
       };
+      newFn.toString = () => fn.toString();
+      return newFn;
     });
 
     newVisitor[key] = fns;