Nothing
isCorrectLength <-
function(arg, argLength = 1) { #spits out an error if argument is of wrong length. returns true if there are no errors (NULL or correct length)
if (!is.null(arg)){
if (length(arg) != argLength) {sprintf('Option %s takes argument of at most length %s', arg, argLength)}
else {TRUE}
}
else {TRUE}
}
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