Exporting non-S3-methods with dots in the name using roxygen2 v4

Since `roxygen2` version `4.0.0`, the `@S3method` tag has been deprecated in favour of using `@export`. The package now tries to detect if a function is an S3 method, and automatically adds the line `S3method(function,class)` to the `NAMESPACE` file if it think it is one. The problem is that if a function is not an S3 method but its name contains a `.` then roxygen sometimes makes a mistake and adds the line when it shouldn't. Is there a way to tell roxygen that a function is not an S3 method? As requested, here's a reproducible example. I have a package that imports `R.oo`, with a function named `check.arg`. ``` library(roxygen2) package.skeleton("test") cat("Imports: R.oo\n", file = "test/DESCRIPTION", append = TRUE) writeLines( "#' Check an argument #' #' Checks an argument. #' @param ... Some arguments. #' @return A value. #' @export check.arg <- function(...) 0", "test/R/check.arg.R" ) roxygenise("test") ``` Now the namespace contains the line `S3method(check,arg)`. `check` is an S3 generic in `R.oo`, so roxygen is trying to be smart and guessing that I want `check.arg` to be an S3 method. Unfortunately, these functions are unrelated, so I don't. (To preempt suggestions that I just rename `check.arg`: this is legacy code written by others, and I've created a `checkArg` replacement, but I need to leave `check.arg` as a deprecated function for compatibility.)