def detach_disk(self, host_device):
        run_process(["virsh", "-c", self.url, "detach-disk",
                    self.instance_id,
                    host_device])
Test that a layer exists in the data collection
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/functional/test_cinder.py/VirtIOClient.detach_disk--crossover with--dataset/ETHPy150Open glue-viz/glue/glue/app/qt/tests/test_layer_tree_widget.py/TestLayerTree.layer_present