def bool_prop(self, attr_name):
        value = getattr(self, attr_name)
        if value is None:
            return False
        return value
testing if the tasks_treeView lists all the tasks properly
dataset/ETHPy150Open python-openxml/python-docx/docx/oxml/styles.py/CT_LatentStyles.bool_prop--crossover with--dataset/ETHPy150Open eoyilmaz/anima/tests/ui/test_version_creator.py/VersionCreatorTester.test_tasks_tree_view_lists_all_tasks_properly