.onUnload <- function(...){
detach("package:plyr")
detach("package:ggplot2")
detach("package:dplyr")
detach("package:tidyr")
detach("package:readr")
detach("package:haven")
detach("package:lubridate")
detach("package:stringr")
detach("package:readxl")
detach("package:devtools")
detach("package:xml2")
detach("package:testthat")
detach("package:assertthat")
}
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