From 92ee9bb5641e17221a2e64e5961db44857cc21a4 Mon Sep 17 00:00:00 2001
From: Sergey Vasiliev <Sergey.Vasiliev@jetbrains.com>
Date: Thu, 13 Aug 2009 16:37:28 +0400
Subject: [PATCH] IDEADEV-39532

---
 xml/openapi/src/com/intellij/psi/xml/XmlTag.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xml/openapi/src/com/intellij/psi/xml/XmlTag.java b/xml/openapi/src/com/intellij/psi/xml/XmlTag.java
index b4a8dd8cda65..69c470b0328a 100644
--- a/xml/openapi/src/com/intellij/psi/xml/XmlTag.java
+++ b/xml/openapi/src/com/intellij/psi/xml/XmlTag.java
@@ -74,7 +74,7 @@ public interface XmlTag extends XmlElement, PsiNamedElement, PsiMetaOwner, XmlTa
 
   @NotNull @NonNls String getNamespacePrefix();
   @NotNull @NonNls String getNamespaceByPrefix(@NonNls String prefix);
-  String getPrefixByNamespace(@NonNls String namespace);
+  @Nullable String getPrefixByNamespace(@NonNls String namespace);
   String[] knownNamespaces();
 
   boolean hasNamespaceDeclarations();