Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/11336
@wangmiao1981 These are required for the recently added CRAN checks to
ensure we could release SparkR as a R package.
1) - note in-line - they need to have `#' @rdname`
2) - I'm not sure about "Column-class" we should check the generated .Rd
file
As for "head", I think it's because there is an existing generic and that
has `...` in the signature
Did it work if you skip the generic here
`setGeneric("head")`https://github.com/apache/spark/pull/11336/files#diff-8e3d61ff66c9ffcd6ffb7a8eedc08409R555
If not, we need to match the existing generic
https://stat.ethz.ch/R-manual/R-devel/library/utils/html/head.html
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