Syntactic Sugar for Learner Construction

Overloads mlr3::lrn to automatically detect if required packages are installed.

lrn(.key, ...)

lrns(.keys, ...)

Arguments

.key	(character(1)) Key passed to mlr_learners to retrieve the learner.
...	ANY Passed to mlr3::lrns
.keys	(character()) Keys passed to mlr_learners to retrieve the learners.