Nothing

```
#' @rdname rlm.summaries
#'
#' @method formula rlm
#' @export
formula.rlm <- function(x, ...) {
if(!is.null(x$formula)) {
form <- formula(x$terms) # has . expanded
environment(form) <- environment(x$formula)
form
} else {
formula(x$terms)
}
}
```

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