#' geom_bar_RHW
#'
#' @param addition Add this fraction to the height of a plot
#' @export
geom_bar_RHW = function(addition = 1.1){
list(geom_bar(stat = 'identity'),
scale_y_continuous(expand = c(0,0)),
geom_blank(aes(y=addition*value), stat="identity"))
}
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