use_rextdata(compress = "xz", pkg = ".", overwrite = FALSE)
"gzip" compression, or one of "gzip", "bzip2" or
"xz" to indicate the type of compression to be used.as.package for more information.Adds the rextdata package to the Imports section of the
DESCRIPTION, creates a helper file that loads all external data
sets via auto_extdata, and converts all existing data sets
to extdata files.