def next(self):
        line = self.readline()
        if (line == None) or (len(line) == 0):
            raise StopIteration
        return line
Decide if ports in network need to be sent to the DNS service.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/grizzled/grizzled/io/__init__.py/PushbackFile.next--crossover with--dataset/ETHPy150Open openstack/neutron/neutron/plugins/ml2/extensions/dns_integration.py/DNSExtensionDriver.external_dns_not_needed