var errs error
	for key := range un.Object {
		if _, ok := validFields[key]; !ok {
			errs = multierror.Append(errs, fmt.Errorf("unknown field %q", key))
		}
	}
	return errs
}

func (v *validator) validateResource(istioNamespace, defaultNamespace string, un *unstructured.Unstructured, writer io.Writer) (validation.Warning, error) {
	g := config.GroupVersionKind{
		Group:   un.GroupVersionKind().Group,

		},
	}

	for i, c := range cases {
		t.Run(fmt.Sprintf("[%v] %v ", i, c.name), func(tt *testing.T) {
			defer func() { recover() }()
			v := &validator{}
			var writer io.Writer
			warn, err := v.validateResource("istio-system", "", fromYAML(c.in), writer)
			if (err == nil) != c.valid {
				tt.Fatalf("unexpected validation result: got %v want %v: err=%v", err == nil, c.valid, err)
			}
			if (warn != nil) != c.warn {