def add_year_range(self, start_year, end_year, force=False):
        for year in range(start_year, end_year + 1):
            self.add_year(year, force)
given an MPlug, get its value
dataset/ETHPy150Open impactlab/eemeter/eemeter/weather.py/NOAAWeatherSourceBase.add_year_range--crossover with--dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/api/allapi.py/getPlugValue