def database_forwards(self, app_label, schema_editor, from_state, to_state):
        raise NotImplementedError('subclasses of Operation must provide a database_forwards() method')
Returns the McKean-Schrader estimate of the standard error of the sample
dataset/ETHPy150Open django/django/django/db/migrations/operations/base.py/Operation.database_forwards--crossover with--dataset/ETHPy150Open scipy/scipy/scipy/stats/mstats_basic.py/stde_median