def convert(self, value):
        return convert_to_format(value, self._format)
L{_HostResource.getChild} returns the proper I{Resource} for the vhost
dataset/ETHPy150Open klen/graphite-beacon/graphite_beacon/alerts.py/BaseAlert.convert--crossover with--dataset/ETHPy150Open twisted/twisted/twisted/web/test/test_vhost.py/HostResourceTests.test_getChild