def lookup_bus(self, name=None, controller=None):
        if name is not None:
            return self.buses.get(name, None)
        else:
            for bus in self.buses.values():
                if bus.controller != controller:
                    return bus
dataset/ETHPy150Open openxc/openxc-python/openxc/generator/message_sets.py/MessageSet.lookup_bus/operator `==` -> `!=`