// It is a wrapper of func keepOrDeleteNullInObj
func keepOrDeleteNullInJsonPatch(patch []byte, keepNull bool) ([]byte, map[string]interface{}, error) {
	var patchMap map[string]interface{}
	err := json.Unmarshal(patch, &patchMap)
	if err != nil {
		return nil, nil, err
	}
	filteredMap, err := keepOrDeleteNullInObj(patchMap, keepNull)
	if err != nil {
		return nil, nil, err
	}

	err := yaml.Unmarshal(filterNullTestCaseData, &tc)
	if err != nil {
		t.Fatalf("can't unmarshal test cases: %s\n", err)
	}

	for _, test := range tc.TestCases {
		resultWithNull, err := keepOrDeleteNullInObj(test.OriginalObj, true)
		if err != nil {
			t.Errorf("Failed in test case %q when trying to keep null values: %s", test.Description, err)
		}
		if !reflect.DeepEqual(test.ExpectedWithNull, resultWithNull) {