def createBranch(self, newBranch, where, troveList = []):
        raise NotImplementedError
Return a factor having root ``v``
dataset/ETHPy150Open sassoftware/conary/conary/repository/repository.py/IdealRepository.createBranch--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/polys/numberfields.py/_choose_factor