return func(patch interface{}) bool {
		patchMap, ok := patch.(map[string]interface{})
		if !ok {
			return true
		}
		patchMap1, ok := patchMap["metadata"]
		if !ok {
			return true
		}
		patchMap2, ok := patchMap1.(map[string]interface{})
		if !ok {
			return true
		}
		_, ok = patchMap2[key]
		return !ok
	}
}

func ToYAMLOrError(v interface{}) string {

	if err != nil {
		return nil, err
	}

	var patchMap map[string]interface{}
	err = json.Unmarshal(patch, &patchMap)
	if err != nil {
		return nil, fmt.Errorf("failed to unmarshal patch for precondition check: %s", patch)
	}
	meetPreconditions, err := meetPreconditions(patchMap, fns...)
	if err != nil {
		return nil, err
	}
	if !meetPreconditions {

	if err != nil {
		t.Errorf("error creating patch bytes %v", err)
	}
	var patchMap map[string]interface{}
	err = json.Unmarshal(patchBytes, &patchMap)
	if err != nil {
		t.Errorf("error unmarshalling json patch : %v", err)
	}
	metadata, ok := patchMap["metadata"].(map[string]interface{})
	if !ok {
		t.Errorf("error converting metadata to version map")
	}