Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/14734#discussion_r75581656
--- Diff: R/pkg/R/DataFrame.R ---
@@ -2880,7 +2880,7 @@ setMethod("fillna",
#'
#' @param x a SparkDataFrame.
#' @param row.names NULL or a character vector giving the row names for
the data frame.
--- End diff --
updated a few places we are referencing `NULL` literally.
there are more "null" in DataFrame or column function documentation but
they are in somewhat gray area - JVM `null` are mapped to R `NA` (and not to
`NULL`) - and we should look into the best way to name functions or document
them.
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