--- old/src/java.base/unix/classes/sun/nio/fs/UnixFileSystemProvider.java	2018-11-27 07:49:01.077946589 -0800
+++ new/src/java.base/unix/classes/sun/nio/fs/UnixFileSystemProvider.java	2018-11-27 07:49:00.741946779 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -56,6 +56,10 @@
         theFileSystem = newFileSystem(userDir);
     }
 
+    UnixFileSystem theFileSystem() {
+        return theFileSystem;
+    }
+
     /**
      * Constructs a new file system using the given default directory.
      */