Refactor #699

Job	Run time
Detect Changes	7s
constantpredictor/iris	55s
constantpredictor/kc2	55s
constantpredictor/cholesterol	3m 7s
randomforest/iris	1m 14s
randomforest/kc2	1m 20s
randomforest/cholesterol	1m 18s
autogluon/iris	43s
autogluon/kc2	38s
autogluon/cholesterol	38s
autogluon/iris	11s
autogluon/kc2	15s
autogluon/cholesterol	14s
autosklearn/iris	13s
autosklearn/kc2	13s
autosklearn/cholesterol	12s
gama/iris	11s
gama/kc2	14s
gama/cholesterol	15s
h2oautoml/iris	12s
h2oautoml/kc2	12s
h2oautoml/cholesterol	14s
mlplanweka/iris	12s
mlplanweka/kc2	14s
mlplanweka/cholesterol	12s
mlr3automl/iris	12s
mlr3automl/kc2	14s
mlr3automl/cholesterol	12s
naiveautoml/iris	1s
naiveautoml/kc2	1s
naiveautoml/cholesterol	11s
tpot/iris	1s
tpot/kc2	1s
tpot/cholesterol	1s
tunedrandomforest/iris	1s
tunedrandomforest/kc2	1s
tunedrandomforest/cholesterol	1s
	15m 6s

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