Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/13734
Thank you for narrowing the scope. Indeed, this seems to be an experimental
attempt.
I rebased to resolved the conflict. As @felixcheung mentioned, the use of
function signature is the remains.
The function signature comes due to the following:
https://home.apache.org/~dongjoon/spark-2.0.0-docs/api/R/show.html
```
Note
show(Column) since 1.4.0
show(GroupedData) since 1.4.0
show(SparkDataFrame) since 1.4.0
show(WindowSpec) since 2.0.0
```
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