From 45592dc94ea9586fec0f21e2caca95a045bc5736 Mon Sep 17 00:00:00 2001
From: Dmitry Trofimov <dmitry.trofimov@jetbrains.com>
Date: Wed, 23 Mar 2011 16:27:57 +0300
Subject: [PATCH] Refactored a bit.

---
 python/src/com/jetbrains/python/psi/PyUtil.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/src/com/jetbrains/python/psi/PyUtil.java b/python/src/com/jetbrains/python/psi/PyUtil.java
index c7ca1e99b990..cadc466e444c 100644
--- a/python/src/com/jetbrains/python/psi/PyUtil.java
+++ b/python/src/com/jetbrains/python/psi/PyUtil.java
@@ -108,7 +108,8 @@ public class PyUtil {
     return ArrayUtil.toObjectArray(result, aClass);
   }
 
-  public static PyExpression flattenParens(PyExpression expr) {
+  @Nullable
+  public static PyExpression flattenParens(@Nullable PyExpression expr) {
     while (expr instanceof PyParenthesizedExpression) {
       expr = ((PyParenthesizedExpression) expr).getContainedExpression();
     }