@classmethod
    def disabled_fields(cls, obj, ar):
        return set()
@summary gets standard deviation of returns for a fund as a string
dataset/ETHPy150Open lsaffre/lino/lino/core/actors.py/Actor.disabled_fields--crossover with--dataset/ETHPy150Open tucker777/QSTK/Bin/report.py/get_std_dev