def rollback(self):
        if self.transaction is None:
            pass
        else:
            self.transaction.rollback()
Fit one boosting stage, returning a new
dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/orm/session.py/Session.rollback--crossover with--dataset/ETHPy150Open ufora/ufora/packages/python/pyfora/algorithms/regressionTrees/GradientBoostedRegressorBuilder.py/IterativeFitter.next