How to properly document S4 “[” and “[<-“ methods using roxygen?

Question

Below I posted a mini example in which I want do write documentation for an “[“ method for a S4 class. Does someone know how to properly document a method for t

Answer 1

I finally figured it out more or less. At least it works now:

#' An S4 class that stores a string.
#' @slot a contains a string
#' @export
setClass("testClass", 
     representation(a="character"))

#' extract parts of testClass
#'
#' @name [
#' @aliases [,testClass-method
#' @docType methods
#' @rdname extract-methods
#'
setMethod("[", signature(x = "testClass", i = "ANY", j="ANY"),
    function (x, i, j, ..., drop){
       print("void function")
    }
)