def fillna(self, method, limit=None):
        return self._upsample(method, limit=limit)
Function to help construct_graph() identify dependencies
dataset/ETHPy150Open pydata/pandas/pandas/tseries/resample.py/Resampler.fillna--crossover with--dataset/ETHPy150Open tonyfischetti/sake/sakelib/acts.py/check_for_dep_in_outputs