public Map<String, String> values() {
        return new HashMap<>(this.data);
    }
@Test
    public void testScript_whenMetadataWithoutPropertiesValueNull_returnMetadataWithAllValue() {
        TbMsgMetaData tbMsgMetaData = new TbMsgMetaData(metadataExpected);
        Map<String, String> dataActual = tbMsgMetaData.values();
        assertEquals(metadataExpected.size(), dataActual.size());
    }