Nested estimator (it supposed that evaluator is already included).
Override this method and create forks to train from the data.
Override this method and create forks to train from the data.
Given models trained for each fork create a combined model.
Given models trained for each fork create a combined model. This model is the result of the estimator.
Nested estimator to call for each fork.
Nested estimator to call for each fork.
Used to train and evaluate model in folds.