@Test
public void addSourceMap() {

    Map<String, String> retrieved = kiePMMLMiningModelWithSources.getSourcesMap();
    assertTrue(retrieved.isEmpty());
    kiePMMLMiningModelWithSources.addSourceMap("KEY", "VALUE");
    retrieved = kiePMMLMiningModelWithSources.getSourcesMap();
    assertTrue(retrieved.containsKey("KEY"));
    assertEquals("VALUE", retrieved.get("KEY"));
}