Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/19657#discussion_r149331874
--- Diff: R/pkg/vignettes/sparkr-vignettes.Rmd ---
@@ -1183,3 +1183,24 @@ env | map
```{r, echo=FALSE}
sparkR.session.stop()
```
+
+```{r cleanup, include=FALSE}
+# clean up if Spark was downloaded
+# get0 not supported before R 3.2.0
+sparkDownloaded <- mget(".sparkDownloaded"[1L],
--- End diff --
since this needs to go into 2.2, let's not add a public method for now, we
could revisit this for 2.3
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