Github user SparkQA commented on the issue: https://github.com/apache/spark/pull/22155 **[Test build #94962 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/94962/testReport)** for PR 22155 at commit [`27497f5`](https://github.com/apache/spark/commit/27497f5c92182df12e1f5750adf1384a4b7084d0). * This patch passes all tests. * This patch merges cleanly. * This patch adds the following public classes _(experimental)_: * `case class Foo(bar: Option[String])`
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