def _build_url(self, url):
        return urlparse.urljoin(
            self.url,
            url
        )
If a volume is attached but the ``IBlockDeviceAPI`` returns a value
dataset/ETHPy150Open jmcarp/robobrowser/robobrowser/browser.py/RoboBrowser._build_url--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/BlockDeviceDeployerDiscoverStateTests.test_attached_with_wrong_device_path_type