def shutdown(self, vm_names=None, reboot=False):
        """
        Shutdown this prefix

        Args:
            vm_names(list of str): List of the vms to shutdown
            reboot(bool): If true, reboot the requested vms

        Returns:
            None
        """
        self.virt_env.shutdown(vm_names, reboot)
Shutdown this prefix

        Args:
            vm_names(list of str): List of the vms to shutdown
            reboot(bool): If true, reboot the requested vms

        Returns:
            None