Nothing
test_that("selected_features", {
task = tsk("sonar")
lrn = lrn("classif.rpart")
measures = list(msr("classif.ce"), msr("selected_features"))
rr = resample(task, lrn, rsmp("holdout"), store_models = TRUE)
perf = rr$aggregate(measures)
expect_count(perf[["selected_features"]])
})
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