case containsVolumeMode(csiDriver.Spec.VolumeLifecycleModes, c.volumeLifecycleMode):
		// Explicitly listed.
		return nil
	default:
		return fmt.Errorf("volume mode %q not supported by driver %s (only supports %q)", c.volumeLifecycleMode, driver, csiDriver.Spec.VolumeLifecycleModes)
	}
}

// containsVolumeMode checks whether the given volume mode is listed.