@property
    def _series_name_ref(self):
        return "Sheet1!$%s$1" % self._col_letter
Checks if the given value is L{constants.VALUE_NONE}.
dataset/ETHPy150Open scanny/python-pptx/pptx/chart/data.py/_SeriesData._series_name_ref--crossover with--dataset/ETHPy150Open ganeti/ganeti/lib/ht.py/TValueNone