Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/1813#discussion_r15907168
--- Diff: core/src/main/java/com/google/common/base/Optional.java ---
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2011 The Guava Authors
--- End diff --
PS I checked and there is no additional change we need to make to LICENSE
or NOTICE as a result of including this. Guava is already AL2 and has no NOTICE
that pertains to this file.
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