--- /dev/null	2015-04-26 06:51:08.003313989 -0700
+++ new/jdk/src/jdk.internal.le/share/classes/jdk/internal/jline/internal/Preconditions.java	2015-06-25 08:33:19.324434666 -0700
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2002-2012, the original author or authors.
+ *
+ * This software is distributable under the BSD license. See the terms of the
+ * BSD license in the documentation provided with this software.
+ *
+ * http://www.opensource.org/licenses/bsd-license.php
+ */
+package jdk.internal.jline.internal;
+
+// Some bits lifted from Guava's ( http://code.google.com/p/guava-libraries/ ) Preconditions.
+
+/**
+ * Preconditions.
+ *
+ * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
+ * @since 2.7
+ */
+public class Preconditions
+{
+    public static <T> T checkNotNull(final T reference) {
+        if (reference == null) {
+            throw new NullPointerException();
+        }
+        return reference;
+    }
+}