If the package argument is NULL, then all current
platforms are downloaded. If the package argument is specified,
then all flavours used for the latest package checks for that
package, are downloaded and returned.
cran_check_flavours(package = NULL)CRAN package name or NULL.
Character vector of platform ids.
if (FALSE) {
cran_check_flavours()
cran_check_flavours("simplegraph")
}