From d11a2e3d4883561daae973b871d513848505b739 Mon Sep 17 00:00:00 2001
From: Jason <jason.daurus@gmail.com>
Date: Wed, 20 Jan 2016 13:01:32 +0800
Subject: [PATCH] Add type annotations for Whitespace._findToken

---
 packages/babel-generator/src/whitespace.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/babel-generator/src/whitespace.js b/packages/babel-generator/src/whitespace.js
index 4235ddb7cb..50652316e0 100644
--- a/packages/babel-generator/src/whitespace.js
+++ b/packages/babel-generator/src/whitespace.js
@@ -82,9 +82,9 @@ export default class Whitespace {
    * Find a token between start and end.
    */
 
-  _findToken(test, start, end) {
+  _findToken(test: Function, start: number, end: number): ?number {
     const middle = (start + end) >>> 1;
-    const match = test(this.tokens[middle]);
+    const match: number = test(this.tokens[middle]);
     if (match < 0 && end > middle) {
       return this._findToken(test, middle + 1, end);
     } else if (match > 0 && start < middle) {