def stack_widget(self):
        d = self.declaration.stack_widget()
        if d is not None:
            return d.proxy.widget

    #--------------------------------------------------------------------------
    # Child Events
    #--------------------------------------------------------------------------
Compute n-th cumulant given moments.
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/qt/qt_stack_item.py/QtStackItem.stack_widget--crossover with--dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/distributions/edgeworth.py/cumulant_from_moments