Nothing
# adapted from answers on https://stackoverflow.com/questions/4948361/how-do-i-save-warnings-and-errors-as-output-from-a-function
capture <- function(expr) {
wrn <- err <- NULL
value <- withCallingHandlers(tryCatch(expr,
error=function(e) {
err <<- e
NULL
}),
warning=function(w) {
wrn <<- append(wrn, conditionMessage(w))
invokeRestart("muffleWarning")
})
list(value=value, warning=wrn, error=err$message)
}
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