def getErrorMessage(self):
        return self._errorMessage
registerWidget(reg: module_registry, basicModules: package,
dataset/ETHPy150Open rwl/muntjac/muntjac/data/validators/null_validator.py/NullValidator.getErrorMessage--crossover with--dataset/ETHPy150Open VisTrails/VisTrails/vistrails/packages/spreadsheet/basic_widgets.py/registerWidget