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Subkey Description                                                                                                                              
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Method Choose which ensemble method to use. If you do not wish to use an ensemble, use Single or top_N with size 1.                             
Size   Number of estimators to use in the ensemble for the top_N method, or the number of bags for the Bagging method.                          
Metric Metric used to determine ranking of estimators in ensemble. When using default, the metric that is used in the hyperoptimization is used.
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