roxygen2/ how to have only one help page for S4 generic and its methods?

Question

Despite of experimenting with various stackoverflow answers on the topic and reading support documentation: http://r-pkgs.had.co.nz/man.html

I still haven't been able to create a package help page that would contain an S4 generic function and all of its methods as one and only one help page.

#' generic function for plotting classical multidimensional scaling
#' @param object (ReportClass or RunClass)
#' @rdname plotCMDS
#' @export

setGeneric("plotCMDS", function(object) {
standardGeneric("plotCMDS")})

#' @rdname plotCMDS
#' @export
setMethod("plotCMDS", signature(object = "ReportClass"), function(object) {
object@cdms})

#' @rdname plotCMDS
#' @export
setMethod("plotCMDS", signature(object = "RunClass"), function(object) {
listcmds <- lapply(object@reports, function(x) slot(x, "cmds"))
listcmds <- lapply(listcmds, `[[`, 1)
do.call(gridExtra::grid.arrange,  listcmds)})

This still shows in RStudio as two separate help pages both having the same content:

I would like to have only one help page:"plotCMDS generic function for plotting classical multidimensional scaling" including both the generic and its two methods.

Answer 1

My mistake. The help pages were correcty rendered in the pdf file as specified above. It was just that pdf file and RStudio GUI rendered the help pages differently.