@Utils.timeIt
    def Jtvec(self, m, v, u=None):
        raise NotImplementedError('Jt is not yet implemented.')
Returns:
dataset/ETHPy150Open simpeg/simpeg/SimPEG/Problem.py/BaseProblem.Jtvec--crossover with--dataset/ETHPy150Open meraki-analytics/cassiopeia/cassiopeia/type/core/stats.py/AggregatedStats.average_objective_score