From 873bb64aaf8f72bfa1eccd69280af10d983467fc Mon Sep 17 00:00:00 2001
From: Maxim Medvedev <maxim.medvedev@jetbrains.com>
Date: Tue, 16 Nov 2010 13:15:21 +0300
Subject: [PATCH] EA-23181 - NPE:
 GrailsGroovySourceFolderDetector.isGroovySourceFolder

---
 platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java b/platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java
index 57af041c825f..3e6c16b5e48d 100644
--- a/platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java
+++ b/platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java
@@ -92,6 +92,7 @@ public class VfsUtil {
    * @param separator character to use as files separator
    * @return the relative path
    */
+  @Nullable
   public static String getRelativePath(@NotNull VirtualFile file, @NotNull VirtualFile ancestor, char separator) {
     if (!file.getFileSystem().equals(ancestor.getFileSystem())) return null;