@property
    def traceback(self):
        return '' if self.exc is None else traceback_str(self.exc)
:return: Set of all case types for the domain excluding the CallCenter case type.
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.main/src/openmdao/main/case.py/Case.traceback--crossover with--dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/callcenter/indicator_sets.py/CallCenterIndicators.case_types