flatten = FALSE, a structured S3 object is returned. The S3 object
only has one slot, which is called
levels. This contains a named list. Each
name refers to
package from the call to
the entries are character vectors of the form “package.level”. With
flatten = TRUE, a simple character vector is returned that contains all
concatenated entries of
levels from above.
parallelGetRegisteredLevels(flatten = FALSE)
character. See above.