def destroy(self):
subnets = (<EOL>str(net.gw()) for net in self.virt_env.get_nets().values()<EOL>)<EOL>self._subnet_store.release(subnets)<EOL>self.cleanup()<EOL>shutil.rmtree(self.paths.prefix_path())<EOL>
Destroy this prefix, running any cleanups and removing any files
inside it.