#' @param cl [\code{character(1)}]\cr
#'   Class of learner. By convention, all classification learners
#'   start with \dQuote{classif.}, all regression learners with
#'   \dQuote{regr.}, all survival learners start with \dQuote{surv.},
#'   all clustering learners with \dQuote{cluster.}, and all multilabel
#'   classification learners start with \dQuote{multilabel.}.
#'   A list of all integrated learners is available on the
#'   \code{\link{learners}} help page.

