@abstractmethod
    def marketDataType(self, reqId, marketDataType):
Add a role or append parents roles to a special role.
dataset/ETHPy150Open CarterBain/Medici/ib/ext/EWrapper.py/EWrapper.marketDataType--crossover with--dataset/ETHPy150Open tonyseek/simple-rbac/rbac/acl.py/Registry.add_role