String string,
            String sourceHint,
            InputLocationTracker tracker,
            String... validValues) {
        if (string == null || string.isEmpty()) {
            return true;
        }

        List<String> values = Arrays.asList(validValues);

        if (values.contains(string)) {
            return true;
        }

        addViolation(

            String string,
            String sourceHint,
            InputLocationTracker tracker,
            String... validValues) {
        if (string == null || string.isEmpty()) {
            return true;
        }

        List<String> values = Arrays.asList(validValues);

        if (values.contains(string)) {
            return true;
        }

        addViolation(

		return allErrors
	}
	switch *restartPolicy {
	case core.ContainerRestartPolicyAlways:
		break
	default:
		validValues := []core.ContainerRestartPolicy{core.ContainerRestartPolicyAlways}
		allErrors = append(allErrors, field.NotSupported(fldPath, *restartPolicy, validValues))
	}

	return allErrors
}

type commonHandler struct {
	Exec      *core.ExecAction
	HTTPGet   *core.HTTPGetAction