public static String getDataSourceUnitNode(final String databaseName, final String dataSourceName) {
        return String.join("/", getDataSourceUnitsNode(databaseName), dataSourceName);
    }
@Test
    void assertGetMetaDataDataSourceNode() {
        assertThat(DataSourceMetaDataNode.getDataSourceUnitNode("foo_db", "foo_ds"), is("/metadata/foo_db/data_sources/units/foo_ds"));
    }